1939 ⟶ Britain and France Declare War on Germany

September 3: Britain and France declare war on Germany; Worl...
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Year
1916
1917
1918
1939
1940
1944

🪖 First Tank Use at the Battle of Flers–Courcelette

September 15–22: First use of tanks at the Battle of Flers–Courcelette.⟶
First Tank Use at the Battle of Flers–Courcelette (1916)
World War ITanksMilitary TechnologyWestern FrontWeapons Development
FranceFranceUnited KingdomUnited KingdomGermanyGermany

🇺🇸 United States Enters World War I

April 6: USA joins the Entente for the last 17 months of World War I.⟶
World War IAlliancesMilitary InterventionGlobal ConflictInternational RelationsWoodrow WilsonWarfareWestern Front
United StatesUnited StatesFranceFranceUnited KingdomUnited KingdomGermanyGermany

💥 Hundred Days Offensive: Allied Victory and German Collapse

August–November: The Hundred Days Offensive sends Germany into defeat.⟶
Hundred Days Offensive: Allied Victory and German Collapse (1918)
World War IWestern FrontAllied PowersCentral PowersTrench WarfareMilitary OffensiveArmisticeGerman Empire
GermanyGermanyFranceFranceUnited KingdomUnited KingdomUnited StatesUnited StatesBelgiumBelgium

💣 Britain and France Declare War on Germany

September 3: Britain and France declare war on Germany; World War II begins.⟶
World War IIAxis PowersAllied PowersGlobal ConflictTotal War
United KingdomUnited KingdomFranceFranceGermanyGermany

✈️ Battle of Britain: Aerial Combat Defeats Axis

July – October: Battle of Britain, the first entirely aerial military campaign, becomes the first significant defeat for the Axis powers.⟶
Battle of Britain: Aerial Combat Defeats Axis (1940)
World War IIStrategic BombingLuftwaffeAxis PowersAllied PowersMilitary StrategyTurning Point
United KingdomUnited KingdomGermanyGermany

🪖 Allied Landings in Normandy

June 6: D-Day landings in Normandy.⟶
Allied Landings in Normandy (1944)
World War IIWestern FrontAllied PowersAxis PowersInvasionMilitary StrategyLiberation
FranceFranceUnited KingdomUnited KingdomUnited StatesUnited StatesCanadaCanadaGermanyGermany