1918 ⟶ Hungarian–Romanian War Begins

The Hungarian–Romanian War begins.
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Year
1918
1919
1939
1940

⚔️ Hungarian–Romanian War Begins

The Hungarian–Romanian War begins.⟶
Hungarian–Romanian War Begins (1918)
HungaryRomaniaWarWorld War IPost-WarTerritorial DisputesEastern Europe

⚔️ Polish-Soviet War Begins

The Polish–Soviet War begins with border clashes between the two states.⟶
Polish-Soviet War Begins (1919)
Eastern EuropeWarPolandRussiaConflictBordersSoviet Union

🕊️ Hungarian–Romanian War Ends

The Hungarian–Romanian War ends.⟶
Eastern EuropeWarHungaryRomaniaConflictTreaty

⚔️ Slovak-Hungarian War Begins

The Slovak–Hungarian War begins.⟶
Slovak-Hungarian War Begins (1939)
warSlovakiaHungaryborder conflictterritorial disputeEastern Europeconflictpre-war tensionsminor powersinternal conflict

🕊️ Slovak–Hungarian War Ends

The Slovak–Hungarian War ends.⟶
SlovakiaHungaryWarBorder DisputeTerritorial ChangesCentral Europe1939

🤝 Second Vienna Award: Northern Transylvania Ceded to Hungary

Adolf Hitler and Benito Mussolini dictated the so-called Second Vienna Award which forced Romania to hand over the Northern Transylvania (including the entire Maramureș and part of Crișana) to Hungary.⟶
Second Vienna Award: Northern Transylvania Ceded to Hungary (1940)
RomaniaHungaryGermanyItalyTerritorial DisputesEastern EuropeAxis PowersVienna Award