# Travel >> Destinations >> Europe

Post-WWI Treaties: Reshaping Borders in Europe and Asia

The Paris Peace Conference (1919–1923) produced a treaty system that dismantled four empires and created the modern nation-state map of Europe and the Middle East.

Europe: Empire Dissolution

Treaty	Date	Defeated Power	Territorial Outcomes
Versailles	1919	Germany	Alsace-Lorraine → France; Eupen-Malmedy → Belgium; Posen/West Prussia → Poland (corridor); Danzig = Free City; Saar → League; Rhineland demilitarized; colonies → mandates
Saint-Germain	1919	Austria-Hungary	Austria (rump); Hungary independent; Czechoslovakia, Yugoslavia, Poland, Romania, Italy gain lands; Anschluss forbidden
Trianon	1920	Hungary	Lost 72% territory: Transylvania → Romania; Slovakia/Ruthenia → Czechoslovakia; Croatia/Slovenia → Yugoslavia; Burgenland → Austria
Neuilly	1919	Bulgaria	Western Thrace → Greece; Dobruja → Romania; border strips → Yugoslavia; Aegean access lost
Sèvres	1920	Ottoman Empire	Anatolia partitioned; never ratified; replaced by Lausanne
Lausanne	1923	Turkey	Modern Turkey borders; population exchange (Greeks↔Turks); Straits demilitarized; no Kurdish/Armenian state

Asia & Pacific: Mandate System

German colonies → League of Nations mandates:
- Japan: Mariana, Caroline, Marshall Islands (North Pacific).
- Australia: German New Guinea, Nauru.
- New Zealand: Western Samoa.
- UK: Tanganyika, part of Togoland/Cameroon.
Ottoman Arab lands → Class A mandates:
- France: Syria, Lebanon.
- UK: Iraq, Palestine (incl. Transjordan).
Russian losses (Brest-Litovsk 1918, reversed): Finland, Baltics, Poland, Ukraine, Caucasus independent briefly; most reabsorbed by USSR by 1922.

Long-Term Consequences

Ethnic minorities stranded in new states (Germans in Czechoslovakia/Poland, Hungarians in Romania, etc.).
Irredentism → WWII (Sudetenland, Danzig, South Tyrol).
Mandate borders → modern Middle East conflicts (Sykes-Picot legacy).
League of Nations created – collective security failed.