1. Germany:
-Alsace-Lorraine: The region of Alsace-Lorraine, which had been part of Germany since 1871, was returned to France.
-Eupen-Malmédy: The eastern part of the Eupen-Malmédy region was transferred from Germany to Belgium.
-North Schleswig: A plebiscite was held in North Schleswig to determine its fate, and as a result, the northern part became part of Denmark.
-Posen and West Prussia: Parts of Posen and West Prussia were ceded to Poland, creating the "Polish Corridor" that separated East Prussia from the rest of Germany.
2. Austria-Hungary (Dissolved):
-Austria: The former Austro-Hungarian Empire was dismantled, leading to the creation of several new countries, including Austria, Hungary, Czechoslovakia, and Yugoslavia.
-Czechoslovakia: Czechoslovakia gained control of the Sudetenland region, which had a significant German population, and other areas previously under Austro-Hungarian rule.
-Yugoslavia: Yugoslavia was formed by the unification of the Kingdom of Serbia and the State of Slovenes, Croats, and Serbs.
3. Ottoman Empire (Partially Dissolved):
-Armenian Genocide: The Treaty of Sèvres, which was initially proposed but not ratified, aimed to reduce the Ottoman Empire's territory significantly and recognize an independent Armenia. However, the treaty was never implemented due to the Turkish War of Independence.
4. Russia:
-Brest-Litovsk Treaty: The Bolshevik government of Russia signed the Treaty of Brest-Litovsk with Germany in March 1918, ceding significant territories in Eastern Europe to Germany and its allies.
-Polish-Soviet War: Following World War I, the newly established Second Polish Republic engaged in the Polish-Soviet War (1919-1921). The war resulted in the Riga Peace Treaty, which defined Poland's eastern border and granted it additional territories from Ukraine and Belarus.
5. Other Territorial Adjustments:
-Danzig: The city of Danzig (now Gdańsk, Poland) became a free city under the protection of the League of Nations.
-Fiume: The city of Fiume (now Rijeka, Croatia) became a free city, but was later annexed by Italy in 1924.
-Saarland: The Saarland region was placed under the administration of the League of Nations for 15 years, after which a plebiscite determined its future status.