Assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, who was killed in Sarajevo along with his wife Sophie, Duchess of Hohe...

Tags: Assassination, Franz Ferdinand, Sarajevo, Gavrilo Princip, Austria-Hungary, Balkan Peninsula, World War I, Cause of War, Nationalism

Austria-Hungary seeks German support for a war against Serbia in case of Russian military intervention. German Empire gives assurances of support.

Tags: Alliance System, Diplomacy, Germany, Austria-Hungary, Russia, World War I, July Crisis, Military Support

Beginning of the "Black Week". Austria-Hungary sends an ultimatum to Kingdom of Serbia. Kingdom of Serbia responds that night, agreeing to most but no...

Tags: Ultimatum, Serbia, Austria-Hungary, July Crisis, Diplomacy, World War I, Political Tensions, Black Week

Kingdom of Serbia mobilizes, expecting Austria to declare war after the refusal of the ultimatum.

Tags: Mobilization, Serbia, Austria-Hungary, Military, World War I, July Crisis, Military Readiness, Tensions

Austria mobilizes against Serbia. Russia enters the period preparatory to war (partial mobilization).

Tags: Mobilization, Austria-Hungary, Serbia, Russia, World War I, Military Buildup, July Crisis, Escalation

To my peoples. Austria-Hungary declares war on Serbia.

Tags: Declaration of War, Austria-Hungary, Serbia, World War I, July Crisis, Start of War, Balkan Front

Willy–Nicky correspondence. Wilhelm II, German Emperor and Nicholas II of Russia communicate via telegram.

Tags: Diplomacy, Willy-Nicky, Germany, Russia, World War I, Communication, July Crisis, Kaiser Wilhelm II, Tsar Nicholas II

Germany sends Russia an ultimatum.

Tags: Ultimatum, Germany, Russia, World War I, Diplomacy, Military, July Crisis, Escalation

Sweden announces neutrality in the conflict between Austria-Hungary and Serbia

Tags: Neutrality, Sweden, World War I, Diplomacy, Non-intervention

Germany declares war on Russia and mobilizes.

Tags: Declaration of War, Germany, Russia, Mobilization, World War I, Eastern Front, Military

Germany invades Luxembourg. (Details)

Tags: Invasion, Germany, Luxembourg, World War I, Western Front, Military Strategy, Schlieffen Plan

Germany besieges and captures fortified Longwy, "the Iron Gate to Paris", near the Luxembourg border, opening France to mass German invasion.

Tags: Siege, Germany, Longwy, France, World War I, Western Front, Military Action, Schlieffen Plan

Germany declares war on France. Belgium denies permission for German forces to pass through to the French border.

Tags: Declaration of War, Germany, France, Belgium, World War I, Western Front, Schlieffen Plan, Neutrality

German invasion of Belgium (1914) to outflank the French army. Rape of Belgium

Tags: Invasion, Germany, Belgium, Rape of Belgium, World War I, Western Front, Schlieffen Plan, War Crimes

Battle of Liège. The Germans besiege and then capture the fortresses of Liège, Belgium.

Tags: Battle, Liège, Germany, Belgium, World War I, Western Front, Military Strategy, Siege

First weapon fired in Melbourne, Australia, by Australian troops

Tags: Australia, Military, World War I, Training, Early Actions, Home Front, Melbourne

Austria-Hungary declares war on Russia.

Tags: Declaration of War, World War I, Eastern Front, Austria-Hungary, Russia, Diplomacy, Alliances, Military Action

Battle of the Frontiers. The Germans obtain a victory against the British Expeditionary Force and France's Fifth Army.

Tags: World War I, Western Front, Battle, Germany, France, United Kingdom, Military Strategy, Initial Battles, Warfare

Battle of Mulhouse, a phase of the Battle of the Frontiers.

Tags: World War I, Western Front, Battle of the Frontiers, France, Germany, Military Action, Alsace

Montenegro declares war on Germany.

Tags: World War I, Declaration of War, Balkans, Montenegro, Germany, Alliances, Military Involvement

The Togoland Campaign begins.

Tags: World War I, African Campaign, Colonial Warfare, Germany, United Kingdom, France, Togoland

France declares war on Austria-Hungary.

Tags: World War I, Declaration of War, Western Front, France, Austria-Hungary, Alliances, Military Action, Diplomacy

The United Kingdom declares war on Austria-Hungary.

Tags: World War I, Declaration of War, Western Front, United Kingdom, Austria-Hungary, Alliances, Military Action, Diplomacy

Battle of Lorraine, a phase of the Battle of the Frontiers.

Tags: World War I, Western Front, Battle of the Frontiers, France, Germany, Military Strategy, Warfare, Battle

Battle of Dinant, during the German invasion of Belgium. Including Sack of Dinant (August 23)

Tags: World War I, Western Front, Belgium, Germany, Massacre, War Crimes, Invasion of Belgium

The Serbs defeat the Austro-Hungarians at the Battle of Cer.

Tags: World War I, Balkans, Serbia, Austria-Hungary, Battle, Eastern Front, Military Victory

German troops cross into East Africa Protectorate and occupy Taveta. (Details)

Tags: World War I, African Campaign, Colonial Warfare, Germany, East Africa, Military Occupation

Battle of Stallupönen. The Russian army enters East Prussia.

Tags: World War I, Eastern Front, Battle, Russia, Germany, East Prussia, Military Action, Warfare

The Germans attack the Russians in East Prussia at the Battle of Gumbinnen. The attack is a failure in addition to being a deviation from the Schlieff...

Tags: World War I, Eastern Front, Battle, Germany, Russia, Military Strategy, Schlieffen Plan, Warfare

Battle of Charleroi, a phase of the Battle of the Frontiers.

Tags: World War I, Western Front, Battle of the Frontiers, France, Germany, Belgium, Military Action, Warfare

Battle of the Ardennes, a phase of the Battle of the Frontiers.

Tags: Western Front, Battle of the Frontiers, German Offensive, Military Strategy, First World War, 1914, Belgium, France

Japan declares war on Germany. (Details)

Tags: World War I, East Asia, Pacific Theater, Allies, Central Powers, Colonialism, German Empire, Imperialism

Battle of Tannenberg: the Russian army undergoes a heavy defeat by the Germans.

Tags: Eastern Front, German Victory, Military Strategy, First World War, 1914, Russian Army, Hindenburg, Ludendorff

Battle of Galicia. The Russians capture Lviv.

Tags: Eastern Front, Russian Offensive, First World War, 1914, Lviv, Galicia, Austria-Hungary, Military Campaign

Battle of Kraśnik, a phase of the Battle of Lemberg. The Austro-Hungarian First Army defeats the Russian Fourth Army.

Tags: Eastern Front, Battle of Lemberg, First World War, 1914, Military Strategy, Russian Army, Austro-Hungarian Army, Poland

Action of Elouges

Tags: Western Front, First World War, 1914, Belgium, German Army, Military Engagement, Battle

Siege of Maubeuge. The Germans besiege and capture the Maubeuge Fortress.

Tags: Western Front, Siege, First World War, 1914, French Army, German Army, Fortress, Military Campaign

The Allied Great Retreat to the River Marne.

Tags: Western Front, Retreat, First World War, 1914, French Army, British Expeditionary Force, German Army, Military Strategy

Japan declares war on Austria-Hungary.

Tags: World War I, Allies, Central Powers, East Asia, Pacific Theater, 1914, Diplomacy, Imperialism

Battle of Le Cateau results in an Allied retreat.

Tags: Western Front, British Expeditionary Force, First World War, 1914, German Army, Retreat, Military Engagement, Battle

Battle of Gnila Lipa, a phase of the Battle of Lemberg.

Tags: Eastern Front, Battle of Lemberg, First World War, 1914, Military Engagement, Russian Army, Austro-Hungarian Army

Battle of Komarów (1914), part of the Battle of Lemberg.

Tags: Eastern Front, Battle of Lemberg, First World War, 1914, Military Engagement, Russian Army, Austro-Hungarian Army

British and French forces conquer Togoland, a German protectorate in West Africa. (Details)

Tags: African Campaign, Colonialism, First World War, 1914, German Colonies, British Empire, French Colonial Empire, West Africa

Siege of Mora

Tags: African Campaign, German Colonies, First World War, 1914, Siege, Military Campaign, Colonialism

Rearguard Affair of Étreux

Tags: Western Front, First World War, 1914, French Army, German Army, Military Engagement, Battle

Siege of Tsingtao: British and Japanese forces capture the German-controlled port of Qingdao in Republic of China (1912–1949).

Tags: Colonialism, Pacific Theater, Siege, Anglo-Japanese Alliance, Qingdao, World War I, East Asia, German Empire, Military cooperation

The Royal Navy wins the First Battle of Heligoland Bight (1914) in the North Sea.

Tags: Naval Battle, North Sea, Royal Navy, Kaiserliche Marine, Early Battles, World War I, Sea warfare, United Kingdom, Germany

Battle of St. Quentin (1914), also known as Battle of Guise. Orderly Allied retreat.

Tags: Western Front, Retreat, Military Strategy, German Offensive, World War I, Battle of Guise, France, Germany, Tactical Maneuvering

First Battle of Garua

Tags: African Theater, Colonial Warfare, Cameroon, World War I, Germany, United Kingdom, France, Military Conflict, Imperialism

Occupation of German Samoa. New Zealand occupies German Samoa (later Samoa).

Tags: Oceania, Colonialism, Pacific Theater, World War I, New Zealand, Samoa, German Empire, Occupation, Territorial Expansion

Affair of Néry

Tags: Western Front, Military Action, World War I, France, United Kingdom, Germany, Gallantry, Tank Warfare, Early war

Austro-Hungarian defeat at the Battle of Rawa, a phase of the Battle of Lemberg.

Tags: Eastern Front, Battle of Lemberg, World War I, Austria-Hungary, Russia, Military Defeat, Galicia, Warfare, Strategic failure

First Battle of the Marne. The German advance on Paris is halted, marking the failure of the Schlieffen Plan.

Tags: Western Front, Turning Point, Schlieffen Plan, Trench Warfare, World War I, France, Germany, Military Strategy, Battle

British scout cruiser HMS Pathfinder (1904) is sunk by U-boat SM U-21 off Scotland.

Tags: Naval Warfare, U-boat, Submarine Warfare, World War I, United Kingdom, Germany, Atlantic Ocean, Military Technology, Sea warfare

Battle of the Marshes of Saint-Gond, a phase of the First Battle of the Marne.

Tags: Western Front, First Battle of the Marne, World War I, France, Germany, Military Maneuver, Battle, Defensive Warfare, Warfare

Battle of Nsanakong

Tags: African Theater, Colonial Warfare, World War I, Cameroon, Germany, United Kingdom, France, Military Conflict, Imperialism

First Battle of the Masurian Lakes: The Russian Army of the Neman withdraws from East Prussia with heavy casualties.

Tags: Eastern Front, German Offensive, World War I, Russia, Germany, Military Defeat, East Prussia, Warfare, Strategic Failure

Battle of the Drina

Tags: Balkan Front, Serbian Campaign, World War I, Serbia, Austria-Hungary, Military Conflict, River Battle, Warfare, Early War

Fanning Raid

Tags: Pacific Ocean, Naval Raid, World War I, Germany, United Kingdom, Colonialism, Military Action, Minor Engagement, Warfare

Theobald von Bethmann Hollweg lays out Germany's war aims. (Details)

Tags: German Politics, War Aims, World War I, Germany, Bethmann Hollweg, Political Strategy, Propaganda, Goals, German Empire

Battle of Bita Paka

Tags: World War I, Colonial Warfare, Pacific Theater, Australian Army, German New Guinea, Battle, Military Campaign, Early Battles

The First Battle of the Aisne ends in a substantial draw. The Race to the Sea begins.

Tags: World War I, Western Front, Trench Warfare, Battle, Military Strategy, Race to the Sea, Stalemate, Military Campaign

South West Africa campaign. Troops from South Africa begin invading German South West Africa.

Tags: World War I, African Theater, Colonial Warfare, South African Army, German South West Africa, Military Campaign, Invasion, Imperialism

Erich von Falkenhayn replaces Helmuth von Moltke the Younger as German Chief of Staff.

Tags: World War I, German Military, Chief of Staff, Military Leadership, Erich von Falkenhayn, Helmuth von Moltke the Younger, Military Command, War Strategy

Siege of Toma. Most German forces in German New Guinea surrender to the Australians then or over the following year.

Tags: World War I, Pacific Theater, Colonial Warfare, Australian Army, German New Guinea, Siege, Military Campaign, Surrender

Maritz rebellion. Boers leader Manie Maritz revolts in South Africa.

Tags: World War I, South Africa, Boers, Rebellion, Manie Maritz, Internal Conflict, Military Campaign, Colonialism

Battle of Flirey

Tags: World War I, Western Front, Battle, Trench Warfare, Military Campaign, Lorraine, Attrition Warfare, Military Tactics

Battle of Zanzibar, German naval victory.

Tags: World War I, Naval Warfare, East African Theater, German Navy, Battle, Colonialism, Indian Ocean, Military History

First Battle of Picardy

Tags: World War I, Western Front, Battle, Picardy, Military Campaign, Trench Warfare, Attrition Warfare, Military Tactics

Bombardment of Papeete

Tags: World War I, Pacific Theater, Naval Warfare, Bombardment, German Navy, Colonialism, French Polynesia, Military Action

The Siege of Przemyśl begins.

Tags: World War I, Eastern Front, Siege, Przemyśl, Austria-Hungary, Russian Empire, Military Campaign, Military History

First Battle of Albert (1914)

Tags: World War I, Western Front, Battle, Albert, Military Campaign, Trench Warfare, Attrition Warfare, Military Tactics

Battle of Sandfontein

Tags: World War I, African Theater, Battle, German South West Africa, South African Army, Military Campaign, Colonial Warfare, Military History

Siege of Antwerp (1914). The Germans besiege and capture Antwerp, Belgium.

Tags: World War I, Western Front, Siege, Antwerp, Belgium, Military Campaign, German Army, Military History

Battle of the Vistula River, also known as Battle of Warsaw.

Tags: Eastern Front, Battle, Russian Empire, German Empire, Military Campaign, Warfare, First World War, Poland

Japan occupies the Marshall Islands.

Tags: World War I, Pacific Theater, Japanese Empire, Colonialism, Marshall Islands, Occupation, German Colonies, Imperialism

First Battle of Arras (1914)

Tags: Western Front, Battle, France, Germany, Military Campaign, First World War, Warfare, Arras

Central powers control Belgrade. (Details)

Tags: Balkans, Occupation, Serbia, Austria-Hungary, First World War, Belgrade, Eastern Front

Battle of La Bassée

Tags: Western Front, Battle, France, Germany, Military Campaign, First World War, Warfare, La Bassée

First Battle of Messines (1914)

Tags: Western Front, Battle, Belgium, Germany, Military Campaign, First World War, Warfare, Messines

Battle of Armentières

Tags: Western Front, Battle, France, Germany, Military Campaign, First World War, Warfare, Armentières

Battle of the Yser. French and Belgian forces secure the coastline of Belgium.

Tags: Western Front, Battle, Belgium, France, Germany, Military Campaign, First World War, Yser, Defense

German campaign in Angola. Clashes between German and Portuguese forces in the Portuguese Angola-German South West Africa border, without declaration ...

Tags: African Theater, Colonial Warfare, Angola, Germany, Portugal, First World War, Clashes

The First Battle of Ypres ends the Race to the Sea. The Germans are prevented from reaching Calais and Dunkirk.

Tags: Western Front, Battle, Belgium, Germany, France, United Kingdom, Military Campaign, First World War, Ypres, Race to the Sea

Battle of Penang. The German cruiser Emden sinks two British warships in the Strait of Malacca.

Tags: Naval Battle, Strait of Malacca, German Navy, British Navy, First World War, Emden, Asia

Black Sea raid. Ottoman warships bombard the Russian ports of Odessa and Sevastopol.

Tags: Black Sea, Naval Bombardment, Ottoman Empire, Russian Empire, First World War, War Declaration, Odessa, Sevastopol

Battle of Rufiji Delta, German cruiser SMS Königsberg (1905) destroyed.

Tags: Naval Battle, East Africa Campaign, German Navy, British Navy, Colonial Warfare, First World War, SMS Königsberg, Africa

Russia declares war on the Ottoman Empire.

Tags: War Declaration, Eastern Front, Ottoman Empire, Russian Empire, First World War, Military Alliance

Bergmann Offensive, first military engagement in the Caucasus of the First World War.

Tags: Caucasus Campaign, Eastern Front, Ottoman Empire, Russian Empire, First World War, Military Campaign, Bergmann Offensive

The United Kingdom begins the naval blockade of Germany. (Details)

Tags: Naval Blockade, United Kingdom, Germany, Economic Warfare, First World War, War at Sea, Blockade

Montenegro declares war on the Ottoman Empire.

Tags: World War I, Balkan Front, Ottoman Empire, Declarations of War, Diplomacy, Military Conflict, Nationalism

Von Lettow-Vorbeck's German colonial forces defeat the British at the Battle of Tanga, German East Africa.

Tags: World War I, East African Campaign, Colonial Warfare, Military Defeat, German Colonial Empire, British Empire, Von Lettow-Vorbeck, Tanga

France and the United Kingdom declare war on the Ottoman Empire.

Tags: World War I, Middle Eastern Theater, Declarations of War, Allied Powers, Ottoman Empire, Diplomacy, Military Conflict

Fao Landing, British and Indians besiege the fortress at Fao.

Tags: World War I, Mesopotamian Campaign, British Empire, Indian Army, Military Offensive, Siege, Fao

Japanese Forces capture the Naval Base at Tsingtao. (Details)

Tags: World War I, East Asian Theater, Japanese Empire, German Colonial Empire, Military Occupation, Tsingtao, Naval Base

Sultan Mehmed V declares Jihad on the Allies of World War I.

Tags: World War I, Ottoman Empire, Jihad, Religious Conflict, Propaganda, Sultan Mehmed V, Ideology

Battle of Łódź (1914) (also known as Silesian offensive).

Tags: World War I, Eastern Front, Military Battle, Russian Empire, German Empire, Łódź, Silesian Offensive

Battle of Basra (1914)

Tags: World War I, Mesopotamian Campaign, Military Conflict, British Empire, Ottoman Empire, Basra, Military Battle

Battle of El Herri: Worst French defeat in Morocco at the hands of the Zayanes.

Tags: World War I, North African Campaign, French Colonial Empire, Military Defeat, Moroccan Resistance, El Herri, Colonial Warfare

Battle of Kolubara, Austro-Hungarians withdraw from Serbia.

Tags: World War I, Balkan Front, Serbian Campaign, Military Victory, Austria-Hungary, Serbia, Battle of Kolubara

Bolshevik representatives at the State Duma arrested and exiled to Siberia.

Tags: World War I, Russian Revolution, Bolsheviks, Political Repression, State Duma, Exile, Political Dissidence

Basra is occupied by the British.

Tags: World War I, Mesopotamian Campaign, British Empire, Military Occupation, Ottoman Empire, Basra, Strategic Importance

Battle of Limanowa

Tags: World War I, Eastern Front, Military Battle, Austro-Hungarian Army, Russian Empire, Limanowa, Military Victory

Battle of Qurna

Tags: World War I, Mesopotamian Campaign, Military Battle, British Empire, Ottoman Empire, Qurna, Military Action

Battle of the Falkland Islands. Von Spee's German cruiser squadron is defeated by the Royal Navy.

Tags: World War I, Naval Battle, Royal Navy, German Navy, Sea Warfare, Von Spee, Falkland Islands

Hill 60 (Ypres) captured by the Germans.

Tags: Western Front, Ypres Salient, Trench Warfare, German Offensive, Battle, World War I

Persian campaign (World War I). Ottomans occupy the Persian border town of Qatur as a bridgehead to the Caucasus, but withdraw after their defeat at S...

Tags: Persian Campaign, Ottoman Empire, Caucasus Campaign, Border Conflict, World War I, Sarıkamış

Raid on Scarborough, Hartlepool and Whitby. The German fleet shells Scarborough, North Yorkshire, Hartlepool, and Whitby England.

Tags: Naval Warfare, German Navy, Coastal Bombardment, Home Front, World War I, Raid

First Battle of Artois

Tags: Western Front, Battle, French Army, German Army, World War I, Trench Warfare

Christian X, Gustaf V, and Haakon VII meet at Malmö to discuss neutrality, which leads to Denmark joining Sweden and Norway in neutrality

Tags: Neutrality, Scandinavia, Diplomacy, World War I, International Relations

Battle of Givenchy

Tags: Western Front, Trench Warfare, Battle, World War I, German Offensive

Fighting begins at Perthes, Ardennes.

Tags: Western Front, Ardennes, Battle, World War I, Trench Warfare

First Battle of Champagne

Tags: Western Front, Champagne, Battle, French Army, World War I, Trench Warfare

Fighting begins at Noyon.

Tags: Western Front, Battle, World War I, Trench Warfare

The Russians win the Battle of Sarikamish, Caucasia.

Tags: Caucasus Campaign, Russian Army, Ottoman Empire, World War I, Battle

In some sectors of the Western Front, an unofficial Christmas truce is observed between German and British forces.

Tags: Western Front, Christmas, Truce, Humanity, World War I, Trench Warfare

Battle of Ardahan

Tags: Caucasus Campaign, Russian Army, Ottoman Empire, World War I, Battle

The Russian offensive in the Carpathians begins. It will continue until April 12.

Tags: Eastern Front, Carpathian Mountains, Russian Army, World War I, Austro-Hungarian Army

Ottomans occupy Urmia and Tabriz by surprise.

Tags: Persian Campaign, Ottoman Empire, Military Occupation, World War I

Japan attempts to impose its Twenty-One Demands on neutral China.

Tags: Twenty-One Demands, Japan, China, Imperialism, World War I, Asia

Battle of Jassin.

Tags: East Africa, Colonial Warfare, German East Africa, Military Campaign, World War I, Tanzania

Battle of Hartmannswillerkopf, series of battles fought to control the peak.

Tags: Western Front, Alsace, Mountain Warfare, World War I, Trench Warfare, Military Campaign

Chilembwe uprising led by John Chilembwe in Nyasaland.

Tags: Anti-Colonialism, Nyasaland, World War I, Rebellion, John Chilembwe, African History

Battle of Dogger Bank between squadrons of the British Grand Fleet and the German Hochseeflotte.

Tags: Naval Battle, North Sea, World War I, Grand Fleet, Hochseeflotte, Sea Warfare

The Ottomans fail to capture the Suez Canal in the First Suez Offensive.

Tags: Suez Canal, World War I, Ottoman Empire, Egypt, Military Campaign, Middle East

The Russians take Tabriz.

Tags: Persia, World War I, Russian Empire, Middle East, Military Campaign

Battle of Bolimov. First German use of chemical weapons.

Tags: Chemical Warfare, World War I, Eastern Front, War Crimes, Military Technology, Germany

Germany begins unrestricted submarine warfare against merchant vessels.

Tags: Submarine Warfare, World War I, Atlantic Ocean, Naval Warfare, Unrestricted Warfare, Germany

Second Battle of the Masurian Lakes. The Russian X Army is defeated.

Tags: Eastern Front, World War I, Military Campaign, Germany, Russian Empire

Troops in Singapore mutiny against the British

Tags: Mutiny, Singapore, World War I, Colonialism, Asia, British Empire

British and French naval attack on the Dardanelles. The Gallipoli Campaign begins.

Tags: Gallipoli Campaign, World War I, Dardanelles, Ottoman Empire, Military Campaign, Anzac

Great Britain and France promise Russia Constantinople.

Tags: Treaties, World War I, Secret Diplomacy, Ottoman Empire, Russia, Eastern Front

Ottomans retreat to Qotur, pushed by a Russian counteroffensive.

Tags: Middle East, Ottoman Empire, World War I, Russian Empire, Military Campaign, Persia

Battle of Neuve Chapelle. After an initial success, a British offensive is halted.

Tags: Western Front, World War I, Trench Warfare, Military Campaign, Germany, United Kingdom

Battle of Más a Tierra. The last remnant of the German East Asia Squadron is sunk and its crew interned in neutral Chile.

Tags: Naval Battle, World War I, Pacific Ocean, German Navy, Chile, South America

Battle of 18 March. The British and French unsuccessfully try to force the Dardanelles, losing 3 Pre-Dreadnought Battleships

Tags: World War I, Naval Warfare, Dardanelles Campaign, Ottoman Empire, Gallipoli, Failed Offensive, Strategic Blunder, Royal Navy, French Navy

The Siege of Przemyśl ends. The Russians capture the fortress.

Tags: World War I, Eastern Front, Siege, Fortress Warfare, Russian Empire, Austria-Hungary, Galicia, Military Campaign

First Battle of Woevre.

Tags: World War I, Western Front, Trench Warfare, Military Battle, French Army, German Army, Lorraine

Battle of Shaiba.

Tags: World War I, Mesopotamian Campaign, Ottoman Empire, British Empire, Iraq, Military Battle

Battle of Dilman

Tags: World War I, Caucasian Campaign, Ottoman Empire, Russian Empire, Persia, Military Battle

The Ottomans besiege the Armenian city of Van.

Tags: World War I, Armenian Genocide, Siege, Ottoman Empire, Armenian Resistance, Van, Eastern Front

The Second Battle of Ypres, which ends in a stalemate. Germany first uses poison gas.

Tags: World War I, Western Front, Poison Gas, Chemical Warfare, Trench Warfare, Military Battle, Stalemate, Germany, Ypres

Battle of Gravenstafel, First stage of the Second Battle of Ypres.

Tags: World War I, Western Front, Second Battle of Ypres, Trench Warfare, Military Battle, German Army, French Army, Ypres

Deportation of Armenian intellectuals to Ankara, first act of the Armenian genocide.

Tags: World War I, Armenian Genocide, Genocide, Deportation, Ottoman Empire, Human Rights, Mass Atrocity, Ankara, Armenians

Battle of St Julien, part of the Second Battle of Ypres.

Tags: World War I, Western Front, Second Battle of Ypres, Trench Warfare, Military Battle, German Army, French Army, Ypres

Allied forces land on Gallipoli, landing at Ari Burnu, soon renamed Anzac Cove, and Cape Helles. (Details)

Tags: World War I, Dardanelles Campaign, Gallipoli, ANZAC, Ottoman Empire, Amphibious Assault, Military Campaign, Anzac Cove, Cape Helles

Treaty of London between the Entente and Italy.[citation needed]

Tags: World War I, Treaty, Alliance, Italy, Entente Powers, Secret Treaty, Neutrality, WWI Alliances

First Battle of Krithia. The Allied advance is repelled.

Tags: World War I, Dardanelles Campaign, Gallipoli, Ottoman Empire, Military Battle, Trench Warfare, Failed Offensive, Krithia

Battle of Gurin.

Tags: World War I, Caucasian Campaign, Ottoman Empire, Russian Empire, Military Battle

The Gorlice-Tarnów Offensive begins: the German troops under General Mackensen break through the Russian lines in Galicia.

Tags: World War I, Eastern Front, German Offensive, Gorlice-Tarnów, Breakthrough, Russian Empire, Mackensen, Military Campaign, Galicia

Troops withdraw from Anzac Cove.

Tags: Gallipoli Campaign, WWI, Evacuation, Military Strategy, Ottoman Empire, Anzac, ANZAC Cove

Second Battle of Krithia. The Allied attempts at advancing are thwarted again.

Tags: Gallipoli Campaign, WWI, Battle, Military Failure, Ottoman Empire, Western Front

The British liner Lusitania is sunk by a German U-boat.

Tags: WWI, Naval Warfare, Submarine Warfare, Unrestricted Submarine Warfare, Lusitania, United States Entry into WWI, Atlantic Ocean

Battle of Frezenberg Ridge, Part of the Second Battle of Ypres.

Tags: WWI, Western Front, Battle, Second Battle of Ypres, Military Conflict, Trench Warfare

Beginning of the Second Battle of Artois, with the Battle of Aubers

Tags: WWI, Western Front, Battle, Military Conflict, Trench Warfare, Artois, Aubers

Troops from Hungary rout the Russians at Jarosław. Lviv is again in Austrian hands.

Tags: WWI, Eastern Front, Military Conflict, Austria-Hungary, Russian Empire, Jarosław, Lviv

Armistice called at Gallipoli to bury the dead. (Details)

Tags: WWI, Gallipoli Campaign, Armistice, Burial of the Dead, Humanitarianism, Ottoman Empire, Anzac

Windhoek, capital of German South-West Africa, is occupied by South African troops.

Tags: WWI, African Front, Colonial Warfare, South-West Africa, Windhoek, Military Occupation

Battle of Festubert.

Tags: WWI, Western Front, Battle, Trench Warfare, Military Conflict

Battle of Konary.

Tags: WWI, Eastern Front, Battle, Military Conflict, Polish territories

Italy declares war on Austria-Hungary. (Details)

Tags: WWI, Italian Front, Declaration of War, Military Alliance, Triple Entente

Battle of Bellewaarde, final phase of the Second Battle of Ypres.

Tags: WWI, Western Front, Battle, Second Battle of Ypres, Military Conflict, Trench Warfare

Second Battle of Garua.

Tags: WWI, African Front, Colonial Warfare, Battle, German Colonies

The Russian Great Retreat from Poland and Galicia.

Tags: WWI, Eastern Front, Russian Empire, Military Retreat, Galicia, Poland

Third Battle of Krithia. Yet another Allied failure.

Tags: Gallipoli Campaign, WWI, Battle, Military Failure, Ottoman Empire, Western Front, Krithia

Battle of Bukoba.

Tags: East Africa Campaign, Colonial Warfare, German East Africa, Allied Powers, Naval Engagement, Lake Victoria

Mackensen again breaks through the Russian lines in the Lviv area. (Details)

Tags: Eastern Front, German Empire, Austro-Hungarian Empire, Russian Empire, Lviv, Military Offensive, Erich von Falkenhayn, August von Mackensen

First Battle of the Isonzo.

Tags: Italian Front, Austro-Hungarian Empire, Italy, Isonzo River, Trench Warfare, Military Campaign, Alpine Warfare

The Austro-Hungarians re-enter Lviv. (Details)

Tags: Eastern Front, Austro-Hungarian Empire, Russian Empire, Lviv, Military Occupation, Galicia, Military Campaign

The British win the Battle of Gully Ravine.

Tags: Gallipoli Campaign, Ottoman Empire, British Empire, Gully Ravine, Trench Warfare, Military Victory, ANZAC

Battle of Ngaundere

Tags: West Africa Campaign, German Cameroon, Allied Powers, Colonial Warfare, Military Engagement

First aerial victory by a synchronized gun-armed fighter aircraft (Details)

Tags: Aerial Warfare, Aviation, Fighter Aircraft, Technological Advancement, Synchronized Gun, Early Aviation, World War I Technology

The German forces in South-West Africa surrender.

Tags: South-West Africa Campaign, German Empire, Allied Powers, Colonial Warfare, Surrender, Military Defeat, South Africa

Battle of Manzikert.

Tags: Caucasian Campaign, Ottoman Empire, Russian Empire, Manzikert, Military Engagement, Trench Warfare

Second Battle of the Isonzo.

Tags: Italian Front, Austro-Hungarian Empire, Italy, Isonzo River, Trench Warfare, Military Campaign, Alpine Warfare

Italians capture Cappuccio Wood. (Details)

Tags: Italian Front, Austro-Hungarian Empire, Italy, Cappuccio Wood, Military Victory, Trench Warfare

Battle of Kara Killisse.

Tags: Caucasian Campaign, Ottoman Empire, Russian Empire, Military Engagement, Battle

The Germans occupy Warsaw. (Details)

Tags: Eastern Front, German Empire, Russian Empire, Warsaw, Military Occupation, Poland, Military Campaign

Battle of Lone Pine, part of the August Offensive.

Tags: Gallipoli Campaign, ANZAC, Ottoman Empire, Australia, New Zealand, Trench Warfare, Military Engagement

Battle of Krithia Vineyard, part of the August Offensive.

Tags: Gallipoli Campaign, Ottoman Empire, British Empire, Krithia, Trench Warfare, Military Engagement, August Offensive

Allies land at Suvla Bay, a phase of the August Offensive.

Tags: Gallipoli Campaign, August Offensive, Ottoman Empire, World War I, Military Operations, Allies, Landing, Naval Warfare

Battle of Sari Bair, part of the August Offensive. Last and unsuccessful attempt by the British to seize the Gallipoli peninsula.

Tags: Gallipoli Campaign, August Offensive, World War I, Military Failure, Ottoman Empire, British Empire, Battle, Peninsula

Battle of the Nek, a phase of the August Offensive.

Tags: Gallipoli Campaign, August Offensive, World War I, Military Operations, Australia, New Zealand, Ottoman Empire, Battle

Battle of Chunuk Bair, a phase of the August Offensive.

Tags: Gallipoli Campaign, August Offensive, New Zealand, World War I, Military Operations, Ottoman Empire, Battle, Hill

A German U-boat sinks the liner SS Arabic (1902). 44 died including 3 Americans

Tags: World War I, U-boat Warfare, Unrestricted Submarine Warfare, Naval Warfare, United States, Germany, Diplomacy, SS Arabic

Scimitar Hill, a phase of the August Offensive.

Tags: Gallipoli Campaign, August Offensive, World War I, Military Operations, Ottoman Empire, Battle, Hill

Battle of Hill 60, part of the August Offensive.

Tags: Gallipoli Campaign, August Offensive, World War I, Military Operations, Ottoman Empire, Battle, Hill

Sventiany Offensive, a phase of the Gorlice-Tarnow Offensive.

Tags: World War I, Eastern Front, Gorlice-Tarnów Offensive, Military Offensive, Germany, Russia, Sventiany

Germany suspends unrestricted submarine warfare. (Details)

Tags: World War I, U-boat Warfare, Submarine Warfare, Diplomacy, Germany, United States, Lusitania, Warfare

The Zimmerwald Conference of anti-militarist European socialist parties is held in Zimmerwald, Switzerland.

Tags: World War I, Socialism, Anti-Militarism, Zimmerwald Movement, Political Movements, Switzerland, Internationalism, Pacifism

Nicholas II removes Grand Duke Nicholas Nikolayevich as Commander-in-Chief of the Russian Army, personally taking that position.

Tags: World War I, Russian Empire, Nicholas II, Military Leadership, Eastern Front, Tsar, Russia, Political Leadership

Third Battle of Artois.

Tags: World War I, Western Front, Battle, Military Operations, France, Germany, Artois, Trench Warfare

The Germans occupy Vilnius. The Gorlice-Tarnów Offensive ends.

Tags: World War I, Eastern Front, Gorlice-Tarnów Offensive, Military Offensive, Germany, Russia, Occupation, Vilnius

Battle of Loos, a major British offensive, fails.

Tags: World War I, Western Front, Battle of Loos, British Empire, Military Failure, France, Germany, Trench Warfare

Battle of the Hohenzollern Redoubt, a phase of the Battle of Loos.

Tags: World War I, Western Front, Battle of Loos, Military Operations, France, Germany, Trench Warfare, Hohenzollern Redoubt

Second Battle of Champagne.

Tags: Western Front, Battle, France, Germany, Trench Warfare, Offensive, World War I

Battle of Es Sinn.

Tags: Mesopotamian Campaign, Battle, Ottoman Empire, British Empire, Asia, World War I

Allies land troops at Salonika in Greece to aid Serbia.

Tags: Salonika Front, Greece, Serbia, Allied Powers, World War I, Military Intervention

Serbia is invaded by Germany, Austria-Hungary, and Bulgaria.

Tags: Eastern Front, Serbia, Austria-Hungary, Germany, Bulgaria, Invasion, World War I

Edith Cavell executed.

Tags: Belgium, Germany, World War I, Nurse, Execution, Resistance, Propaganda

Bulgaria declares war on Serbia (Details)

Tags: Eastern Front, Serbia, Bulgaria, World War I, Declaration of War, Conflict

Morava Offensive, a phase of the Central Powers Invasion of Serbia, Bulgarians break through Serbian lines.

Tags: Eastern Front, Serbia, Bulgaria, Offensive, World War I, Military Operations

Ovche Pole Offensive, a phase of the Central Powers invasion of Serbia, Bulgarians break through Serbian lines.

Tags: Eastern Front, Serbia, Bulgaria, Offensive, World War I, Military Operations

The United Kingdom declares war on Bulgaria.

Tags: World War I, Declaration of War, United Kingdom, Bulgaria, Allied Powers, Central Powers

France declares war on Bulgaria.

Tags: World War I, Declaration of War, France, Bulgaria, Allied Powers, Central Powers

Battle of Krivolak, first of the Salonika front.

Tags: Salonika Front, Battle, Greece, Serbia, Bulgaria, World War I

Third Battle of the Isonzo

Tags: Italian Front, Battle, Italy, Austria-Hungary, World War I, Isonzo

Italy and Russia declare war on Bulgaria.

Tags: World War I, Declaration of War, Italy, Russia, Bulgaria, Allied Powers, Central Powers

Andrew Fisher resigns as Prime Minister of Australia; he is replaced by Billy Hughes.

Tags: Australia, Politics, Prime Minister, Andrew Fisher, Billy Hughes, World War I

René Viviani resigns as Prime Minister of France; he is replaced by Aristide Briand.

Tags: France, Politics, Prime Minister, René Viviani, Aristide Briand, World War I

Battle of Banjo.

Tags: World War I, Eastern Front, Military Conflict, Serbia, Battles, Central Powers, Balkans

Pro-Central Powers Iranians seize Shiraz from pro-Entente forces and arrest all British citizens in the city.

Tags: World War I, Middle East, Central Powers, Entente Powers, Iran, British Empire, Political Conflict

Fourth Battle of the Isonzo

Tags: World War I, Italian Front, Battles, Italy, Austria-Hungary, Military Conflict

Kosovo Offensive, a phase of the Central Powers invasion of Serbia, Serbians pushed into Albania.

Tags: World War I, Balkans, Serbia, Albania, Central Powers, Military Campaign, Refugees

Russian forces from the Caucasus occupy Tehran.

Tags: World War I, Middle East, Russia, Iran, Occupation, Military Campaign

Armed by Ottomans and Germans, the Libyan Senussi cross the border and attack Egypt from the west. (Details)

Tags: World War I, Africa, Middle East, Egypt, Libya, Ottoman Empire, Germany, Colonialism

Battle of Ctesiphon, in present-day Iraq.

Tags: World War I, Mesopotamian Campaign, Ottoman Empire, British Empire, Iraq, Battles

The Serbian army collapses. It will retreat to the Adriatic Sea and be evacuated by the Italian and French Navies. (Details)

Tags: World War I, Balkans, Serbia, Military Defeat, Evacuation, Italy, France, Naval Operations

Battle of Lake Tanganyika.

Tags: World War I, Africa, Naval Warfare, Colonialism, Tanzania, Germany, United Kingdom, Belgium

Battle of Kosturino

Tags: World War I, Balkans, Military Conflict, Serbia, Bulgaria, Battles

The First Siege of Kut, Mesopotamia, by the Ottomans begins.

Tags: World War I, Mesopotamian Campaign, Ottoman Empire, British Empire, Siege, Iraq

Russians occupy Hamadan.

Tags: World War I, Middle East, Russia, Iran, Occupation, Military Campaign

Gallipoli evacuations, a major Ottoman victory and a "disaster for the Allies."

Tags: World War I, Gallipoli Campaign, Ottoman Empire, British Empire, Australia, New Zealand, France, Military Defeat, Evacuation, Turkey

Douglas Haig replaces John French as commander of the British Expeditionary Force.

Tags: World War I, Western Front, British Army, Douglas Haig, John French, Military Leadership, Command Changes

Carl Zimmermann orders the retreat of all German forces and civilians in Kamerun to the Spanish colony of Río Muni.

Tags: World War I, Africa, German Colonies, Kamerun, Military Retreat, Colonialism

Austro-Hungarian offensive against Montenegro, which capitulates. (Details)

Tags: Balkans, Austria-Hungary, Montenegro, Military Campaign, Eastern Front, Central Powers, World War I, Capitulation

Battle of Sheikh Sa'ad, a phase of the First Siege of Kut.

Tags: Mesopotamia, Siege of Kut, Ottoman Empire, World War I, Middle East, British Empire, Military Campaign

Battle of Mojkovac

Tags: Balkans, Eastern Front, Austria-Hungary, Montenegro, World War I, Military Battle, Winter Warfare

The Gallipoli Campaign ends in an Allied defeat and an Ottoman victory. (Details)

Tags: Gallipoli, Ottoman Empire, World War I, Allied Powers, Military Defeat, ANZAC, Dardanelles, Campaign, Western Front

Battle of Erzurum.

Tags: Caucasus Campaign, Eastern Front, World War I, Ottoman Empire, Russia, Military Battle, Winter Warfare

Corfu occupied by the Allies. (Details)

Tags: Balkans, Allied Powers, Greece, World War I, Mediterranean, Military Occupation

Battle of Wadi, a phase of the First Siege of Kut. (Details)

Tags: Mesopotamia, Siege of Kut, Ottoman Empire, World War I, Middle East, British Empire, Military Campaign

Battle of Hanna, a phase of the First Siege of Kut.

Tags: Mesopotamia, Siege of Kut, Ottoman Empire, World War I, Middle East, British Empire, Military Campaign

Reinhard Scheer is appointed commander of Germany's Hochseeflotte. (Details)

Tags: German Navy, Hochseeflotte, World War I, Reinhard Scheer, Naval Warfare, Admirals, Central Powers

Conscription introduced in the United Kingdom by the Military Service Act 1916. (Details)

Tags: United Kingdom, World War I, Conscription, Military Service Act, Home Front, Allied Powers, Recruitment, Social Impact

Trebizond Campaign.

Tags: Caucasus Campaign, Eastern Front, World War I, Ottoman Empire, Russia, Black Sea, Military Campaign

Battle of Salaita Hill.

Tags: East Africa Campaign, World War I, British Empire, German East Africa, Military Battle, Africa, Colonial Warfare

The Battle of Verdun begins.

Tags: Western Front, World War I, France, Germany, Military Battle, Trench Warfare, Attrition Warfare, Verdun

Battle of Agagia: Senussi rebellion suppressed by the British.

Tags: Senussi, World War I, British Empire, Egypt, Colonial Warfare, North Africa, Rebellion Suppression

German Kamerun (Cameroon) surrenders. (Details)

Tags: African Theater, World War I, German Colonies, Surrender, Colonial Warfare, Central Powers, Allied Powers

Fifth Battle of the Isonzo.

Tags: World War I, Italian Front, Isonzo River, Austria-Hungary, Military Campaign, Trench Warfare, Battles, Italy

Germany resumes unrestricted submarine warfare. (Details)

Tags: World War I, Naval Warfare, U-boats, Atlantic Ocean, United States Entry into WWI, Warfare, Military Strategy, Kaiser Wilhelm II

Battle of Bitlis.

Tags: World War I, Caucasus Campaign, Ottoman Empire, Russian Empire, Military Campaign, Battle, Asia Minor

Battle of Dujaila: a British attempt to relieve Kut failed. (Details)

Tags: World War I, Mesopotamian Campaign, Ottoman Empire, British Empire, Siege, Battle, Military Failure

Germany declares war on Portugal. Portugal officially enters the war. (Details)

Tags: World War I, Portugal, Germany, Declaration of War, Colonial Involvement, Africa, European Front

Battle of Latema Nek.

Tags: World War I, East African Campaign, British Empire, German Empire, Colonial Warfare, Battle, Tanzania

The Manifesto of the Sixteen, declaring Kropotkinist-anarchist support of the Allied war effort, is published. (Details)

Tags: World War I, Anarchism, Political Ideology, Propaganda, Allied Powers, Pacifism, Socialism, Kropotkin

Austria-Hungary declares war on Portugal.

Tags: World War I, Austria-Hungary, Portugal, Declaration of War, European Front, Military Alliances

British preemptively invade the Sultanate of Darfur and annex it to the Anglo-Egyptian Sudan. (Details)

Tags: World War I, Colonialism, British Empire, Sudan, Annexation, Imperialism, Africa, Darfur

Lake Naroch Offensive.

Tags: World War I, Eastern Front, Russian Empire, German Empire, Offensive, Military Campaign, Battle

Battle of Kahe.

Tags: World War I, East African Campaign, British Empire, German Empire, Colonial Warfare, Battle, Tanzania

Easter Rising by Irish rebels for independence from the United Kingdom. (Details)

Tags: World War I, Irish Independence, Rebellion, British Empire, Nationalism, Easter Rising, Ireland, Home Rule

The Kienthal Conference, the second meeting of the anti-war socialist Zimmerwald Movement, is held in Kienthal, Switzerland. (Details)

Tags: World War I, Socialism, Anti-War Movement, Internationalism, Zimmerwald Movement, Political Ideology, Kienthal, Pacifism

Gas attacks at Hulluch.

Tags: World War I, Chemical Warfare, Gas Attacks, Trench Warfare, Warfare, Hulluch, Germany, British Empire

The British forces under siege at Kut surrender to the Ottomans, first siege of Kut ends. (Details)

Tags: World War I, Mesopotamian Campaign, Siege, Ottoman Empire, British Empire, Military Defeat, Kut, Military Strategy

Battle of Kondoa Irangi.

Tags: East Africa Campaign, German East Africa, British Empire, Colonial Warfare, World War I, Military Conflict, Trench Warfare

Germany suspends unrestricted submarine warfare. (Details)

Tags: Submarine Warfare, U-boats, Diplomacy, World War I, Naval Warfare, International Relations, Lusitania, Sussex Pledge

Austro-Hungarian Strafexpedition in Trentino. (Details)

Tags: Italian Front, Alpine Warfare, World War I, Military Offensive, Austro-Hungarian Empire, Trentino, Isonzo Front

Signing of the Sykes-Picot Agreement between Britain and France defining their proposed spheres in the Middle East. (Details)

Tags: Middle East, World War I, Secret Treaties, Imperialism, Colonialism, Ottoman Empire, Post-War Settlements, Sykes-Picot Agreement, France, United Kingdom

Russian forces in Persia link up with the British in Mesopotamia, but it is too late. (Details)

Tags: Persian Campaign, World War I, Military Cooperation, Russian Empire, British Empire, Mesopotamia, Iran, Middle East

Battle of Jutland between Britain's Grand Fleet and Germany's Hochseeflotte. (Details)

Tags: Naval Battle, World War I, North Sea, Grand Fleet, Hochseeflotte, Naval Warfare, Germany, United Kingdom, Jutland

Battle of Mont Sorrel.

Tags: Western Front, World War I, Canadian Corps, Trench Warfare, Military Conflict, Battle of Mont Sorrel, Ypres Salient

Russians fail to encircle Ottoman forces in Persia. (Details)

Tags: Persian Campaign, World War I, Military Failure, Russian Empire, Ottoman Empire, Iran, Middle East

The Brusilov Offensive begins.

Tags: Eastern Front, World War I, Brusilov Offensive, Russian Empire, Austria-Hungary, Military Offensive, Trench Warfare, Germany

The Arab Revolt in Hejaz begins. (Details)

Tags: Arab Revolt, World War I, Ottoman Empire, Middle East, Lawrence of Arabia, Hejaz, Insurgency, Hussein bin Ali

In the Adriatic Sea the Italian troopship SS Principe Umberto is sunk by an Austro-Hungarian submarine. It is the deadliest sinking of the war, with 1...

Tags: Naval Disaster, World War I, Adriatic Sea, Submarine Warfare, Casualties, Italy, Austria-Hungary, Naval Warfare

Italy: Paolo Boselli succeeds Antonio Salandra as Prime Minister. (Details)

Tags: Italian Politics, World War I, Political Leadership, Italy, Paolo Boselli, Government, Prime Minister

Battle of Mecca, Arabs capture the city. (Details)

Tags: Arab Revolt, World War I, Mecca, Ottoman Empire, Middle East, Hejaz, Religious Significance

Percy Sykes marches on Kerman to link up with the Russian forces in central-northern Persia.

Tags: Persian Campaign, World War I, Military Expedition, British Empire, Russian Empire, Kerman, Iran, Percy Sykes

Battle of the Boar's Head, diversion from the Battle of the Somme which began the next day.

Tags: Western Front, World War I, Battle of the Somme, Military Conflict, Trench Warfare, Boar's Head, Germany, United Kingdom

The Social Democratic Party wins a majority in the parliament of the Russian-ruled Grand Duchy of Finland. (Details)

Tags: World War I, Finland, Russian Empire, Social Democratic Party, Parliamentary Elections, Political Developments, Grand Duchy of Finland, Nationalism

The Battle of the Somme begins. (Details)

Tags: World War I, Western Front, Battle of the Somme, Trench Warfare, Attrition Warfare, Military Campaign, Germany, United Kingdom, France

Second Battle of Albert (Opening phase of the Battle of the Somme). (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Trench Warfare, Military Campaign, France, Germany, United Kingdom

British capture Fricourt during the Second Battle of Albert. (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Military Action, United Kingdom, Germany, France

Battle of Taif. (Details)

Tags: World War I, Arab Revolt, Ottoman Empire, Hejaz, Military Conflict, Siege, Middle Eastern Theatre

Battle of Erzincan.

Tags: World War I, Caucasus Campaign, Battle of Erzincan, Russian Empire, Ottoman Empire, Military Conflict, Eastern Front

Ottoman counter-attack into Persia reaches Kermanshah. (Details)

Tags: World War I, Middle Eastern Theatre, Persia, Ottoman Empire, Military Campaign, Kermanshah, Frontlines

British capture La Boisselle during the Second Battle of Albert. (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Military Action, United Kingdom, Germany, France

British capture Mametz Wood during the Second Battle of Albert. (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Military Action, United Kingdom, Germany, France

British capture Ovillers during the Second Battle of Albert and Battle of Bazentin Ridge. (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Military Action, United Kingdom, Germany, France

Battle of Kostiuchnowka.

Tags: World War I, Eastern Front, Battle of Kostiuchnowka, Brusilov Offensive, Military Conflict, Russian Empire, Germany, Ukraine

British capture Contalmaison during the Second Battle of Albert. (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Military Action, United Kingdom, Germany, France

British capture Trônes Wood during the Second Battle of Albert. (Details)

Tags: World War I, Western Front, Battle of the Somme, Second Battle of Albert, Military Action, United Kingdom, Germany, France

Battle of Bazentin Ridge (Initial phase of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Bazentin Ridge, Trench Warfare, Military Campaign, Germany, United Kingdom, France

Battles for Longueval and Delville Wood (Initial phase of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Longueval, Delville Wood, Military Action, United Kingdom, Germany, France

Battle of Fromelles (Initial phase of the Battle of the Somme).

Tags: Western Front, Battle of the Somme, Australian Army, German Army, Trench Warfare, 1916, World War I

Battle of Pozières (Initial phase of the Battle of the Somme) (Details)

Tags: Western Front, Battle of the Somme, Australian Army, German Army, Trench Warfare, 1916, World War I, Attrition Warfare

Battle of Kowel.

Tags: Eastern Front, Brusilov Offensive, Russian Army, German Army, Austro-Hungarian Army, 1916, World War I

German agents sabotage munition factories in Jersey City that supply the Allies, causing the Black Tom explosion.

Tags: Sabotage, Espionage, German Intelligence, Supply Chain, Munitions, 1916, World War I, Black Tom

Battle of Romani. Ottoman attack on the British in the Sinai peninsula fails. (Details)

Tags: Sinai Peninsula, Ottoman Empire, British Empire, Middle Eastern Theatre, 1916, World War I, Desert Warfare

Sixth Battle of the Isonzo. The Italians capture Gorizia (August 9). (Details)

Tags: Italian Front, Isonzo Battles, Italian Army, Austro-Hungarian Army, 1916, World War I, Gorizia

Battle of Doberdo, part of the Sixth Battle of Isonzo.

Tags: Italian Front, Isonzo Battles, Italian Army, Austro-Hungarian Army, 1916, World War I, Doberdò

First battle of Doiran. (Details)

Tags: Macedonian Front, Balkan Front, Bulgarian Army, British Army, French Army, 1916, World War I, Doiran

Ottomans take Hamadan. (Details)

Tags: Persia, Ottoman Empire, Russian Empire, Middle Eastern Theatre, 1916, World War I, Hamadan

Battle of Mlali.

Tags: East African Campaign, German Colonial Empire, British Empire, Belgian Colonial Empire, 1916, World War I, Mlali

Romania enters the war on the Entente's side. Her army is defeated in a few weeks.

Tags: Romanian Campaign, Entente Powers, Central Powers, 1916, World War I, Eastern Front

Conquest of Romania by Central Powers. (Details)

Tags: Romanian Campaign, Central Powers, 1916, World War I, Eastern Front, Occupation

Battle of Transylvania, a phase of the conquest of Romania.

Tags: Romanian Campaign, Transylvania, Eastern Front, 1916, World War I, Austria-Hungary

Italy declares war on Germany.

Tags: Italian Front, Declarations of War, 1916, World War I, Central Powers, Entente Powers

Paul von Hindenburg replaces Erich von Falkenhayn as German Chief of Staff. (Details)

Tags: German High Command, Paul von Hindenburg, Erich von Falkenhayn, Military Leadership, 1916, World War I

The Ottoman Empire declares war on Romania.

Tags: World War I, Eastern Front, Ottoman Empire, Romania, War Declaration, Military Conflict, Balkans, Central Powers

Bulgaria declares war on Romania.

Tags: World War I, Eastern Front, Bulgaria, Romania, War Declaration, Military Conflict, Balkans, Central Powers

Battle of Turtucaia, a phase of the conquest of Romania.

Tags: World War I, Eastern Front, Military Campaign, Romania, Bulgaria, Battle, Balkans, Central Powers

Battle of Guillemont (intermediate phase of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Battle, France, Germany, Military Conflict, Trench Warfare

Battle of Dobrich, a phase of the conquest of Romania.

Tags: World War I, Eastern Front, Military Campaign, Romania, Bulgaria, Battle, Balkans, Central Powers

The Central Powers create a unified command.

Tags: World War I, Central Powers, Military Strategy, Coordination, Germany, Austria-Hungary, Bulgaria, Ottoman Empire

Battle of Kisaki.

Tags: World War I, East African Campaign, Colonial Warfare, Battle, Germany, United Kingdom, Tanzania

Battle of Tabora.

Tags: World War I, East African Campaign, Colonial Warfare, Battle, Germany, Belgium, Tanzania

Battle of Ginchy (intermediate phase of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Battle, France, Germany, Military Conflict, Trench Warfare

Battle of Dutumi.

Tags: World War I, East African Campaign, Colonial Warfare, Battle, Germany, United Kingdom, Tanzania

Monastir Offensive, set up of the Salonika front.

Tags: World War I, Salonika Front, Military Offensive, Serbia, Bulgaria, Greece, France, Balkans

Battle of Malka Nidzhe, a phase of the Monastir Offensive.

Tags: World War I, Salonika Front, Battle, Serbia, Bulgaria, Military Conflict, Balkans

Battle of Kaymakchalan, a phase of the Monastir Offensive.

Tags: World War I, Salonika Front, Battle, Serbia, Bulgaria, Military Conflict, Balkans

Seventh Battle of the Isonzo

Tags: World War I, Italian Front, Battle, Italy, Austria-Hungary, Military Conflict, Trench Warfare

Battle of Flers-Courcelette; the British use armoured tanks for the first time in history. (Details)

Tags: World War I, Western Front, Battle of the Somme, Tank Warfare, Military Technology, France, Germany, United Kingdom, Flers-Courcelette

First Battle of Cobadin, a phase of the conquest of Romania.

Tags: World War I, Eastern Front, Romanian Campaign, Military Campaign, Bulgarian Army, Central Powers

The Brusilov Offensive ends with a substantial Russian success. (Details)

Tags: World War I, Eastern Front, Brusilov Offensive, Russian Empire, Military Offensive, Tsarist Russia, Attrition Warfare, Central Powers

Battle of Morval (part of the final stages of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Military Offensive, Trench Warfare, Attrition Warfare, French Army, British Army

Battle of Thiepval Ridge (part of the final stages of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Military Offensive, Trench Warfare, Attrition Warfare, British Army, German Army

Flamanda Offensive, a phase of the conquest of Romania.

Tags: World War I, Eastern Front, Romanian Campaign, Military Campaign, Romanian Army, Central Powers

Battle of Le Transloy (last stage of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Military Offensive, Trench Warfare, Attrition Warfare, French Army, British Army

Battle of Ancre Heights (last stage of the Battle of the Somme).

Tags: World War I, Western Front, Battle of the Somme, Military Offensive, Trench Warfare, Attrition Warfare, British Army, German Army

First Battle of the Cerna Bend, a phase of the Monastir Offensive. (Details)

Tags: World War I, Balkan Front, Monastir Offensive, Military Campaign, Serbian Army, Central Powers, Macedonia, Ottoman Empire

Eighth Battle of the Isonzo.

Tags: World War I, Italian Front, Isonzo Battles, Military Offensive, Italian Army, Austria-Hungary, Trench Warfare

Battle of Kibata.

Tags: World War I, East African Campaign, German East Africa, Colonial Warfare, Military Campaign, German Army, British Empire

Second Battle of Cobadin, a phase of the conquest of Romania.

Tags: World War I, Eastern Front, Romanian Campaign, Military Campaign, Bulgarian Army, Central Powers

The French recapture Fort Douaumont near Verdun. (Details)

Tags: World War I, Western Front, Battle of Verdun, Military Campaign, French Army, Fortification, German Army

Ninth Battle of the Isonzo.

Tags: World War I, Italian Front, Isonzo Battles, Military Offensive, Italian Army, Austria-Hungary, Trench Warfare

Battle of Matamondo.

Tags: World War I, East African Campaign, German East Africa, Colonial Warfare, Military Campaign, German Army, Portuguese Empire

Battle of the Ancre (closing phase of the Battle of the Somme) (Details)

Tags: World War I, Western Front, Battle of the Somme, Military Offensive, Trench Warfare, Attrition Warfare, British Army, German Army

The Battle of the Somme ends with enormous casualties and an Anglo-French advantage. (Details)

Tags: World War I, Western Front, Battle, Trench Warfare, Attrition Warfare, Anglo-French, Military Campaign, Casualties

HMHS Britannic sinks after hitting a German mine, becoming the largest ship lost during WW1. (Details)

Tags: World War I, Naval History, Shipwreck, Hospital Ship, U-boats, Maritime Disaster, RMS Britannic

Battle of Bucharest, a phase of the conquest of Romania.

Tags: World War I, Eastern Front, Battle, Romanian Campaign, Bucharest, Military Campaign, Central Powers

David Beatty replaces John Jellicoe as commander of the Grand Fleet. Jellicoe becomes First Lord of the Sea. (Details)

Tags: World War I, Royal Navy, Admirals, Grand Fleet, Naval Command, Military Leadership, David Beatty, John Jellicoe

Prunaru Charge, a phase of the Battle of Bucharest, Romanian cavalry desperately charge into enemy lines.

Tags: World War I, Eastern Front, Battle, Romanian Cavalry, Prunaru, Military Action, Bucharest

Allies capture Yanbu. (Details)

Tags: World War I, Arab Revolt, Military Campaign, Yanbu, Middle Eastern Theater, Allied Powers

Battle of the Arges, a phase of the Battle of Bucharest.

Tags: World War I, Eastern Front, Battle, Romanian Campaign, Military Campaign, Bucharest, Arges River

In a four-day crisis December 3–6, 1916, H. H. Asquith is unaware how fast he is losing support. David Lloyd George now has growing Unionist support, ...

Tags: World War I, British Politics, Political Crisis, Prime Minister, H. H. Asquith, David Lloyd George, Government

The Germans occupy Bucharest. The capital of Romania moved to Iaşi. (Details)

Tags: World War I, Eastern Front, Bucharest, Romanian Campaign, Occupation, Central Powers

The new Prime Minister Lloyd George answers the loud demands for a much more decisive government. He energetically sets up a new small war cabinet, a ...

Tags: World War I, British Government, War Cabinet, David Lloyd George, Military Leadership, Political Reform, Cabinet Secretariat

Robert Nivelle replaces Joseph Joffre as Commander-in-Chief of the French Army. (Details)

Tags: World War I, French Army, Military Leadership, Commander-in-Chief, Robert Nivelle, Joseph Joffre, Western Front

Kaocen Revolt: The Tuareg besiege the French garrison at Agadez.

Tags: World War I, African History, Colonialism, Tuareg, Rebellion, Agadez, French Colonialism

Battle of Verdun ends with enormous casualties on both sides.

Tags: World War I, Western Front, Battle, Attrition Warfare, Trench Warfare, Verdun, Enormous Casualties, German Offensive, French Defense

Christmas Battles.

Tags: World War I, Western Front, Truce, Christmas, Spontaneous, Peace, Frontline

Battle of Magdhaba in the Sinai peninsula. (Details)

Tags: World War I, Sinai and Palestine Campaign, Military Campaign, Battle, Magdhaba, Middle Eastern Theater, British Empire

Togoland is divided into British and French administrative zones. (Details)

Tags: Colonialism, African History, World War I, Territorial Division, British Empire, French Empire, Administrative Zones

Grigori Rasputin, Russia's éminence grise, is assassinated. (Details)

Tags: Russian Revolution, World War I, Political Assassination, Romanov Dynasty, Grigori Rasputin, Tsar Nicholas II, Imperial Russia, Conspiracy

Battle of Behobeho.

Tags: East African Campaign, World War I, Military Conflict, German East Africa, British Empire, Trench Warfare

Battle of Rafa. The British drive the Ottomans out of Sinai. (Details)

Tags: Sinai Campaign, World War I, Middle Eastern History, Ottoman Empire, British Empire, Military Victory, Desert Warfare

British raid the Ancre. (Details)

Tags: Western Front, World War I, Military Action, Trench Warfare, Ancre River, British Army, France

The German Foreign Secretary Arthur Zimmermann sends a telegram to his ambassador in Mexico, instructing him to propose an alliance against the United...

Tags: World War I, Diplomacy, Zimmermann Telegram, United States Entry into WWI, German Foreign Policy, Alliance, Mexico, Espionage

Germany resumes unrestricted submarine warfare. (Details)

Tags: World War I, Naval Warfare, Unrestricted Submarine Warfare, U-boats, German Navy, Atlantic Ocean, United States Entry into WWI

SS Housatonic an American steamer carrying wheat from Galveston, Texas to England is sunk by a U-boat.

Tags: World War I, Naval Warfare, U-boats, Submarine Warfare, Atlantic Ocean, Merchant Marine, German Navy, US Neutrality

Mata Hari is arrested in Paris on charges of spying for the Germans.

Tags: World War I, Espionage, Mata Hari, Spy, French Intelligence, German Spying, Paris

Sinking of the SS Mendi-the SS Mendi was a troop ship carrying members of the South African Native Corps (SANLC).The SANLC was a group of black South ...

Tags: World War I, Naval Disaster, SS Mendi, South African Native Labour Corps, Western Front, British Navy, Maritime History, Racial Discrimination

The Germans withdraw to the Hindenburg Line.

Tags: Western Front, World War I, Hindenburg Line, Defensive Strategy, German Army, Trench Warfare, Military Tactics

Second Battle of Kut. The British recapture the city. (Details)

Tags: Mesopotamian Campaign, World War I, Military Conflict, Ottoman Empire, British Empire, Second Battle of Kut, Iraqi History

Arz von Straussenberg replaces Conrad von Hötzendorf as Austro-Hungarian Chief of Staff. (Details)

Tags: World War I, Austro-Hungarian Army, Military Leadership, Arz von Straussenberg, Conrad von Hötzendorf, Eastern Front, War Strategy

The French relieve Agadez.

Tags: African Campaign, World War I, French Colonialism, Military Action, Agadez, Niger

The celebrations of International Women's Day in Petrograd spawn severe protests that will evolve into the February Revolution.

Tags: Russian Revolution, February Revolution, Protests, Social Unrest, Women's Rights, Petrograd, Czarist Russia, Political Instability, World War I (Eastern Front)

The British capture Baghdad. (Details)

Tags: Mesopotamian Campaign, World War I, Middle Eastern History, Ottoman Empire, British Empire, Military Victory, Baghdad

Russian troops refuse to fire on demonstrators after 50 are killed in Petrograd's Znamenskaya Square the day before. Numerous attacks against prisons,...

Tags: Russian Revolution, February Revolution, Military Mutiny, Duma, Provisional Committee, Petrograd Soviet, Political Instability, World War I (Eastern Front), Civil Unrest, Okhrana

Samarra offensive, British capture much of Mesopotamia.

Tags: Mesopotamian Campaign, British Empire, Ottoman Empire, Samarra Offensive, Military Campaign, World War I (Middle East), Iraq, Middle East, Colonialism

Battle of Nambanje.

Tags: East African Campaign, African Front, German East Africa, Military Conflict, Colonial Warfare, World War I (African Front), Tanzania, Battle

China severs relations with Germany.

Tags: Diplomacy, China, World War I, Neutrality, Alliance, East Asia, International Relations, Germany

Nicholas II abdicates. A provisional government is formed.

Tags: Russian Revolution, February Revolution, Abdication, Czar Nicholas II, Provisional Government, Monarchy, Political Transition, World War I (Eastern Front), Russia

Lenin arrives in Petrograd from his exile in Switzerland and publishes his April Thesis.

Tags: Lenin, Bolsheviks, April Thesis, Russian Revolution, Socialism, Political Ideology, Petrograd, Exile, World War I (Eastern Front)

Aristide Briand resigns as Prime Minister of France; he is replaced by Alexandre Ribot.

Tags: French Politics, World War I, Prime Minister, Aristide Briand, Alexandre Ribot, Political Leadership, France

First Battle of Gaza. The British attempt to capture the city fails. (Details)

Tags: Sinai and Palestine Campaign, British Empire, Ottoman Empire, Military Conflict, Gaza, World War I (Middle East), Battle, Palestine

Stalemate in Southern Palestine.

Tags: Sinai and Palestine Campaign, Military Stalemate, Ottoman Empire, British Empire, World War I (Middle East), Palestine, Trench Warfare, Conflict

Australians attack Noreuil. (Details.)

Tags: Western Front, Australian Army, Noreuil, Military Campaign, World War I, France, Battle, Military Conflict

The United States declares war on Germany. (Details)

Tags: United States Entry, World War I, Declaration of War, Germany, American Expeditionary Force, Neutrality, International Relations, Western Front, Military Intervention

Cuba declares war on Germany.

Tags: Cuba, World War I, Declaration of War, Germany, International Relations, Alliance, Caribbean, Military Involvement

Second Battle of Arras. The British attack a heavily fortified German line without obtaining any strategic breakthrough. (Details)

Tags: Western Front, Battle of Arras, Military Campaign, Trench Warfare, Stalemate, World War I, France, Military Conflict

The Canadians obtain a significant victory in the Battle of Vimy Ridge, part of the first phase of the Second Battle of Arras. (Details)

Tags: Battle of Vimy Ridge, Canadian Corps, Second Battle of Arras, Western Front, Military Victory, World War I, Canada, France, Military Achievement

First Battle of the Scarpe, part of the first phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Trench Warfare, 1917, Military Campaign

First Battle of Bullecourt, part of the first phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Tank Warfare, Trench Warfare, 1917

Brazil severs relations with Germany.

Tags: Diplomacy, Alliances, South America, Wartime, Neutrality, Political Relations, World War I, 1917

Bolivia severs relations with Germany.

Tags: Diplomacy, Alliances, South America, Wartime, Neutrality, Political Relations, World War I, 1917

Battle of Lagnicourt, part of the Second phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Trench Warfare, 1917, Military Campaign

The Second Battle of the Aisne (also known as Nivelle Offensive) ends in disaster for both the French army and its commander Robert Nivelle. (Details)

Tags: Western Front, Battle, Aisne, French Army, German Army, Robert Nivelle, Offensive, Military Failure, 1917

Battle of the Hills (also known as Third battle of Champagne), a diversion to the Second Battle of the Aisne.

Tags: Western Front, Battle, Champagne, French Army, German Army, Diversion, 1917, Military Strategy

Second Battle of Gaza. The Ottoman lines resist a British attack. (Details)

Tags: Middle Eastern Front, Battle, Gaza, Ottoman Empire, British Empire, Palestine, Military Campaign, 1917

Second Battle of Doiran. (Details)

Tags: Balkan Front, Battle, Doiran, Bulgaria, British Army, French Army, Military Campaign, 1917

The Ottoman Empire severs relations with the United States.

Tags: Diplomacy, Alliances, Middle East, Wartime, Political Relations, World War I, 1917, Neutrality

Second Battle of Scarpe, part of the second phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Trench Warfare, 1917, Military Campaign

Battle of Arleux, part of the Second phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Trench Warfare, 1917, Military Campaign

Series of mutinies in the French army. (Details)

Tags: Western Front, French Army, Mutiny, Morale, Military History, Discipline, 1917, War Weariness

Third battle of the Scarpe, part of the second phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Trench Warfare, 1917, Military Campaign

Second Battle of Bullecourt, part of the second phase of the Second Battle of Arras. (Details)

Tags: Western Front, Battle, Arras, British Army, German Army, Tank Warfare, Trench Warfare, 1917

Australian Prime Minister Billy Hughes wins an enlarged majority in federal elections with the pro-conscription Nationalist Party. (Details)

Allied Spring offensive on the Salonika front.

Second Battle of the Cerna Bend, a phase of the Allied Spring Offensive. (Details)

Tenth Battle of the Isonzo. (Details)

Philippe Pétain replaces Robert Nivelle as Commander-in-Chief of the French Army. (Details)

Battle of Mount Hermada in the Karst.

Operation Hush, Abortive British plan to capture coast of Belgium.

Second Battle of Messines, the British blow 19 deep mines and recapture Messines Ridge. (Details)

Battle of Mount Ortigara. (Details)

Constantine I of Greece abdicates.

First successful heavy bomber raid on London done by the Gotha G.IV.

First American troops land in France. (Details)

Batterie Pommern aka. 'Lange Max', world's largest gun fires for the first time from Koekelare to Dunkirk (±50 km).

Greece declares war on the Central powers. (Details)

Brief monarchist coup and restoration in China, allegedly promoted by Germany to distance China from the Entente. (Details)

Battle of Zborov, a phase of the Kerensky Offensive. (Details)

The Kerensky Offensive fails. It is the last Russian initiative in the war. (Details)

Arab rebels led by Lawrence of Arabia seize the Jordanian port of Aqaba. (Details)

The Open Letter to Albert I is published by Flemish Movement sympathisers within the Belgian Army on the Yser Front, complaining about official discri...

Petrograd July Days.

The Reichstag passes a Peace Resolution.

Corfu Declaration about the future Kingdom of Yugoslavia. (Details)

Alexander Kerensky replaces Georgy Lvov as Minister-President of the Russian Provisional Government.

Siam declares war on Germany and Austria-Hungary.

Battle of Mărăști

Battle of Kiawe Bridge.

The Third Battle of Ypres (also known as Battle of Passchendaele) begins. (Details)

Battle of Pilckem Ridge (Opening phase of the Third Battle of Ypres).

Battle of Rumbo.

The German raider SMS Seeadler is wrecked at Mopelia in French Polynesia.

Liberia declares war on Germany.

Battle of Mărăşeşti. (Details)

Third Battle of Oituz.

China declares war on Germany and Austria-Hungary.

Battle of Hill 70 (Continuation of British operations near Lens).

Second Battle of Langemarck (Initial phase of the Third Battle of Ypres). (Details)

China terminates the German and Austro-Hungarian concessions in Tianjin.

Eleventh Battle of the Isonzo. (Details)

Second Offensive Battle of Verdun.

Operation Albion. German capture of Oesel, Dago and Moon Islands.

Battle of Jugla.

The Third Zimmerwald Conference of the anti-war socialist Zimmerwald Movement, is held in Stockholm. (Details)

The SMS Seeadler's crew sail to Fiji in a lifeboat and capture the French schooner Lutece, allowing their escape. They rename it Fortuna.

Russia: General Kornilov's coup attempt fails. (Details)

Alexandre Ribot resigns as Prime Minister of France; he is replaced by Paul Painlevé.

Russia declared a republic.

Battle of the Menin Road Ridge (Second phase of the Third Battle of Ypres).

Costa Rica severs relations with Germany.

Battle of Polygon Wood (Second phase of the Third Battle of Ypres).

Battle of Ramadi, Mesopotamia. (Details)

Battle of Broodseinde (Second phase of the Third Battle of Ypres).

The Fortuna wrecks at Easter Island and its crew is interned by the Chileans.

Peru severs relations with Germany.

Uruguay severs relations with Germany.

Battle of Poelcappelle (Last phase of the Third Battle of Ypres).

First Battle of Passchendaele (Last phase of the Third Battle of Ypres).

Mata Hari executed.

Battle of Mahiwa.

Battle of La Malmaison, much-postponed French attack on the Chemin des Dames. (Details)

Battle of Wadi Musa.

Battle of Caporetto. The Austro-Hungarians and Germans break through the Italian lines. The Italian army is defeated and falls back on the Piave River...

Brazil declares war on Germany.

Second Battle of Passchendaele (Last phase of the Third Battle of Ypres).

Battle of Buqqar Ridge.

Italy: Vittorio Emanuele Orlando succeeds Paolo Boselli as Prime Minister. (Details)

Third Battle of Gaza. The British break through the Ottoman lines. (Details)

Battle of Beersheba (opening phase of the Third Battle of Gaza). (Details)

Battle of Tel el Khuweilfe.

Balfour Declaration: the British government supports plans for a Jewish "national home" in Palestine. (Details)

The Allies agree to establish a Supreme War Council at Versailles.

October Revolution: Kerensky flees Petrograd just before the Petrograd Soviet seizes the Winter Palace.

Armando Diaz replaces Luigi Cadorna as Commander-in-Chief of the Italian Army. (Details)

First Battle of the Piave: the Austro-Hungarians and Germans try unsuccessfully to cross the river. (Details)

The Third Battle of Ypres (also known as Battle of Passchendaele) ends. (Details)

First Battle of Monte Grappa, Austro-Hungarian offensive halted.

France: Paul Painlevé is replaced by Georges Clemenceau as Prime Minister. (Details)

Tags: Politics, Leadership, France, World War I, Government, Prime Minister, Clemenceau, Painlevé, Western Front

Battle of Ayun Kara.

Tags: Military, Palestine, Ottoman Empire, World War I, Middle East, Battle, British Army, Ayun Kara

Battle of Jerusalem. The British enter the city (December 11). (Details)

Tags: Military, Palestine, World War I, British Empire, Jerusalem, Ottoman Empire, Battle, Middle East

Second Battle of Heligoland Bight, North Sea. (Details)

Tags: Naval Warfare, North Sea, World War I, Germany, United Kingdom, Battle, Heligoland Bight

Battle of Nebi Samwil, a phase of the Battle of Jerusalem.

Tags: Military, Palestine, World War I, Ottoman Empire, Battle, Jerusalem, British Army, Nebi Samwil

Battle of Caporetto ends. Central Powers take a quarter of a million prisoners. (Details)

Tags: Military, Italy, Austria-Hungary, World War I, Battle, Isonzo Front, Central Powers, Caporetto, Eastern Front

First Battle of Cambrai. A British attack and the biggest German attack against the British since 1915 succeed and the battle is a stalemate. (Details...

Tags: Military, Western Front, World War I, Battle, Tanks, Cambrai, Germany, United Kingdom

Battle of Ngomano, the Germans invade Portuguese East Africa to gain supplies.

Tags: Military, Africa, World War I, East Africa, Colonialism, Ngomano, German East Africa

Battle of El Burj, a phase of the Battle of Jerusalem.

Tags: Military, Palestine, World War I, Ottoman Empire, Battle, Jerusalem, British Army, El Burj

Finland declares independence from Russia.

Tags: Politics, Independence, Finland, Russia, World War I, Nationalism, Self-determination, Russian Revolution

Halifax Explosion: An accidental collision between the Norwegian supply ship SS Imo and the French cargo ship SS Mont-Blanc, laden with high explosive...

Tags: Disaster, Explosion, Halifax, World War I, Canada, Casualties, Maritime, SS Mont-Blanc

The United States declares war on Austria-Hungary.

Tags: Politics, War Declaration, World War I, United States, Austria-Hungary, Alliances, American Involvement

Ecuador severs relations with Germany.

Tags: Diplomacy, Ecuador, Germany, World War I, Neutrality, South America

Romania signs an armistice with the Central Powers.

Tags: Politics, Armistice, World War I, Romania, Central Powers, Eastern Front, Germany

Panama declares war on Austria-Hungary.

Tags: Politics, War Declaration, World War I, Panama, Austria-Hungary, Alliances, American Involvement

General Allenby leads British and Indian troops into Jerusalem, ending 400 years of Ottoman rule.

Tags: Military Occupation, Ottoman Empire, British Empire, Palestine, Jerusalem, Middle East, World War I, Allenby, Religious Significance

Armistice between Russia and the Central Powers, to take effect on December 17.

Tags: Armistice, Eastern Front, World War I, Central Powers, Russia, Treaty Negotiations, Bolsheviks, Russian Revolution, Political Agreement

Armistice of Erzincan between the Ottomans and the Russian Special Transcaucasian Committee.

Tags: Armistice, Caucasus, Ottoman Empire, World War I, Russian Empire, Military Agreement, Regional Conflict

Canadian Prime Minister Robert Borden wins an enlarged majority in federal elections with the pro-conscription Unionist Party. (Details)

Tags: Canada, World War I, Politics, Conscription, Elections, Robert Borden, Unionist Party, Political Victory, Government

Battle of Jaffa, a phase of the Battle of Jerusalem. (Details)

Tags: Military Campaign, World War I, Palestine, Jerusalem, Ottoman Empire, British Empire, Battle, Jaffa, Middle East

Woodrow Wilson outlines his Fourteen Points. (Details)

Tags: World War I, United States, Woodrow Wilson, Fourteen Points, Peace Proposals, Diplomacy, International Relations, Treaty of Versailles, Post-War Plans

Allied forces occupy the Jordan Rift Valley. (Details)

Tags: Military Occupation, World War I, Jordan Rift Valley, British Empire, Ottoman Empire, Palestine, Middle East, Military Strategy

The Central Powers sign an exclusive protectorate treaty with the Ukrainian People's Republic as part of the negotiations in Brest-Litovsk. (Details)

Tags: Treaty, Ukraine, World War I, Central Powers, Brest-Litovsk, Political Agreement, Eastern Front, Protectorate

Battle of Rarancza.

Tags: Battle, Eastern Front, World War I, Romania, Austria-Hungary, Military Conflict, Regional Conflict

Operation Faustschlag, last offensive on Eastern Front.

Tags: Military Offensive, World War I, Eastern Front, Germany, Operation Faustschlag, Russia, Ukraine, Military Action

British begin their assault on Jericho. (Details)

Tags: Military Campaign, World War I, Palestine, British Empire, Jericho, Ottoman Empire, Middle East, Military Action

The British capture Jericho. (Details)

Tags: Military Occupation, World War I, Palestine, British Empire, Jericho, Ottoman Empire, Middle East, Military Victory

Germans capture Zhytomyr. (Details)

Tags: Military Occupation, World War I, Eastern Front, Germany, Ukraine, Zhytomyr, Military Action

German troops capture Tallinn. (Details)

Tags: Military Occupation, World War I, Eastern Front, Germany, Estonia, Tallinn, Military Action

Germans capture Pskov and Narva. (Details)

Tags: Military Occupation, World War I, Eastern Front, Germany, Pskov, Narva, Military Action, Russia, Estonia

Germans capture Kiev. (Details)

Tags: Eastern Front, Occupation, German Empire, WWI Battles, Military Strategy, Ukraine

At Brest-Litovsk, Leon Trotsky signs the peace treaty with Germany. (Details)

Tags: Treaties, Russian Revolution, Eastern Front, Bolsheviks, Leon Trotsky, World War I, Peace Treaty

First known case of what will later be called Spanish flu: Private Albert Gitchell at Camp Funston, Fort Riley, Kansas.

Tags: Pandemics, Spanish Flu, Public Health, Influenza, Camp Funston, Disease, Epidemic

German artillery bombard the Americans at Rouge Bouquet. (Details)

Tags: Western Front, Artillery, Shelling, WWI Battles, United States Army, Military Tactics

Battle of Bakhmach.

Tags: Eastern Front, Czechoslovak Legion, WWI Battles, Military conflict, Ukraine, German Empire

Battle of Tell 'Asur.

Tags: Middle Eastern Front, Palestine Campaign, Ottoman Empire, WWI Battles, British Empire

Over 100 sick from Spanish flu in Fort Riley; first known case outside in Queens, New York.

Tags: Pandemics, Spanish Flu, Public Health Crisis, Disease, Epidemic, Fort Riley, Queens

First phase of the German spring offensive, Operation Michael (also known as Second Battle of the Somme). The Germans obtain a Pyrrhic victory. (Detai...

Tags: Western Front, Spring Offensive, German Empire, WWI Battles, Operation Michael, Military Strategy, Second Battle of the Somme

The Battle of St. Quentin, first phase of Operation Michael and the Spring Offensive. (Details)

Tags: Western Front, Spring Offensive, German Empire, WWI Battles, Operation Michael, Military Strategy

First Transjordan attack on Amman.

Tags: Middle Eastern Front, Palestine Campaign, Ottoman Empire, WWI Battles, British Empire, Transjordan

Artillery bombardment of Paris. (Details)

Tags: Western Front, Artillery, Shelling, WWI Battles, Paris, German Empire

First Battle of Bapaume, a phase of Operation Michael. (Details)

Tags: Western Front, Spring Offensive, German Empire, WWI Battles, Operation Michael

Penza Agreement: The Czechoslovak Legion is given free passage to Vladivostok to join the Entente in return for surrendering most weapons to the Bolsh...

Tags: Russian Civil War, Czechoslovak Legion, Bolsheviks, Eastern Front, Siberia

First Battle of Noyon, a phase of Operation Michael. (Details)

Tags: Western Front, Spring Offensive, German Empire, WWI Battles, Operation Michael

French Marshal Ferdinand Foch is appointed Supreme Commander of all Allied forces. (Details)

Tags: Western Front, Allied Command, Ferdinand Foch, Military Leadership, Supreme Commander, WWI Leadership

Battle of Rosieres, a phase of Operation Michael. (Details)

Tags: World War I, Western Front, Operation Michael, Battle, Somme, German Spring Offensive

First Battle of Amman, a phase Of The First Transjordan Attack.

Tags: World War I, Middle Eastern Theatre, Transjordan, Ottoman Empire, British Empire, Battle

Third Battle of Arras (also known as First Battle of Arras (1918)), a phase of Operation Michael. (Details)

Tags: World War I, Western Front, Operation Michael, Arras, Battle, German Spring Offensive

First Battle of Villers-Bretonneux, a phase of Operation Michael.

Tags: World War I, Western Front, Operation Michael, Tank warfare, Battle, German Spring Offensive

Battle of Moreuil Wood.

Tags: World War I, Western Front, Battle, Canadian Cavalry Brigade, German Spring Offensive

Royal Air Force founded by combining the Royal Flying Corps and the Royal Naval Air Service.

Tags: World War I, Air power, Military aviation, Royal Flying Corps, Royal Naval Air Service, United Kingdom, Technology

Battle of the Avre, final phase of Operation Michael.

Tags: World War I, Western Front, Operation Michael, Battle, German Spring Offensive

Second phase of the Spring Offensive, Operation Georgette (also known as Battle of the Lys). The results are disappointing for the Germans. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle of the Lys, German Spring Offensive, Battle

Battle of Estaires, first phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle, German Spring Offensive

Third Battle of Messines, a phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle, German Spring Offensive

Battle of Hazebrouck, a phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle, German Spring Offensive

Battle of Bailleul, a phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle, German Spring Offensive

Ottokar Czernin resigns as Austria-Hungary's Foreign Minister over the Sixtus Affair.

Tags: World War I, Politics, Austria-Hungary, Diplomacy, Sixtus Affair, Central Powers

First Battle of Kemmelberg, a phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle, German Spring Offensive

Battle of Bethune, a phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Operation Georgette, Battle, German Spring Offensive

The Red Baron is shot down over Vaux-sur-Somme.

Tags: World War I, Air Warfare, Military History, Germany, France, Manfred von Richthofen, Aviation, Western Front, Combat

Guatemala declares war on Germany.

Tags: World War I, Central America, Declaration of War, Diplomacy, Germany, Political History, Alliances

Second Battle of Villers-Bretonneux, a phase of Operation Georgette.

Tags: World War I, Western Front, Battle, Military History, France, Operation Georgette, German Offensive, Tank Warfare, Somme

Second Battle of Kemmelberg, a phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Battle, Military History, Belgium, Operation Georgette, German Offensive, Flanders

Gavrilo Princip dies in Terezín prison, from tuberculosis.

Tags: World War I, Assassination, Serbian Nationalism, Princip, Political History, Austria-Hungary, Prison, Tuberculosis, Causes of World War I

Battle of Scherpenberg, final phase of Operation Georgette. (Details)

Tags: World War I, Western Front, Battle, Military History, Belgium, Operation Georgette, Flanders, German Offensive

Second Transjordan attack on Shunet Nimrin and Es Salt.

Tags: World War I, Middle East, British Empire, Ottoman Empire, Military History, Palestine Campaign, Transjordan, Arab Revolt

Treaty of Bucharest between Romania and the Central Powers. It will never be ratified. (Details)

Tags: World War I, Treaty, Romania, Central Powers, Diplomacy, Eastern Front, Military History

Nicaragua declares war on Germany and Austria-Hungary.

Tags: World War I, Central America, Declaration of War, Diplomacy, Germany, Austria-Hungary, Political History, Alliances

Battle of Kaniow.

Tags: World War I, Eastern Front, Battle, Military History, German Empire, Austria-Hungary, Ukraine, Poland, German Offensive

Clash at Chelyabinsk station between Hungarian POWs heading west to be repatriated and Czechoslovaks going east. Trotsky orders the arrest of the Czec...

Tags: Russian Civil War, World War I, Czechoslovak Legion, Bolsheviks, Trans-Siberian Railway, Military History, Chelyabinsk, Trotsky

Ottomans invade Armenia. (Details)

Tags: World War I, Armenian Genocide, Ottoman Empire, Armenia, Military History, Caucasus Campaign, Invasion, Turkey

Battle of Sardarabad, a phase of the invasion of Armenia.

Tags: World War I, Armenian Genocide, Ottoman Empire, Armenia, Military History, Caucasus Campaign, Invasion, Turkey, Battle

Costa Rica declares war on Germany.

Tags: World War I, Central America, Declaration of War, Diplomacy, Germany, Political History, Alliances

Battle of Karakilisa, a phase of the invasion of Armenia.

Tags: World War I, Armenian Genocide, Ottoman Empire, Armenia, Military History, Caucasus Campaign, Invasion, Turkey, Battle

Third Battle of the Aisne (also known as Operation Blücher-Yorck, third phase of the Spring Offensive). After initial gains, the German advance is hal...

Tags: World War I, Western Front, Spring Offensive, Battle, German Army, French Army, Trench Warfare, Military Strategy

Battle of Cantigny.

Tags: World War I, Western Front, Battle, American Expeditionary Force, Military, United States Army, German Army

Battle of Skra-di-Legen

Tags: World War I, Balkan Front, Battle, Macedonian Front, Allied Powers, Central Powers

Battle of Belleau Wood, part of the German spring offensive.

Tags: World War I, Western Front, Battle, Spring Offensive, United States Marine Corps, German Army, Trench Warfare, Military

The Czechoslovak Legion forms the Committee of Members of the Constituent Assembly in Samara. Stanislav Čeček calls to join forces with anti-Bolshevik...

Tags: World War I, Russian Civil War, Czechoslovak Legion, Anti-Bolshevik, Eastern Front, Intervention, Military, Political

Germany interferes in the Caucasus. (Details)

Tags: World War I, Caucasus Campaign, Geopolitics, Intervention, German Empire, Ottoman Empire, Military

Action of Arsuf.