Template:Borders of the Baltic states From Wikipedia the free encyclopedia Territorial changes ofthe Baltic statesin the 20th century Post World War I Treaty of Versailles (1919) Treaty of Tartu (1920) Soviet–Lithuanian Peace Treaty (1920) Latvian–Soviet Peace Treaty (1920) Suwałki Agreement (1920) Peace of Riga (1921) Klaipėda Revolt (1923) German ultimatum to Lithuania (1939) World War II Lithuanian annexation by the Soviet Union (1940) Latvian annexation by the Soviet Union (1940) Estonian annexation by the Soviet Union (1940) Post World War II Potsdam Conference (1945) Russian–Estonian boundary changes (1945) Russian–Latvian boundary changes (1945) Areas Kresy Wschodnie ("Eastern Borderlands") Petseri County (1944) Abrenes apriņķis (1944) Demarcation lines Curzon Line (1920) Adjacent countries Territorial evolution of Poland vte