The Union of Soviet Socialist Republics was established as a federation on Dec. 30, 1922. The death of Lenin on Jan. 21, 1924, precipitated an intraparty struggle between Joseph Stalin, general secretary of the party, and Trotsky, who favored swifter socialization at home and fomentation of revolution abroad. Trotsky was dismissed as commissar of war in 1925 and banished from…