Union of Soviet Socialist Republics
Union of Soviet Socialist Republics. USSR. 1917 Communist revolution, Civil War. 1923 Union of states. 1939 +Galicia. 1940 +Baltic States, Bessarabia, Karelia. 1945 +Ruthenia. Recognized: 1923 US, 1924 Britain, 1940 Yugoslavia. 1991 Dissolved. Russia.