Leon Trotsky (7 November 1879 -2 1 August 1940) was a Marxist revolutionary and theorist, Soviet politician, and the founder and first leader of the Red Army. During the early days of the Soviet Union, he served as People's Commissar for Foreign Affairs and later as the founder and commander of the Red Army. He was a major figure in the Bolshevik victory in the Russian Civil War (1918–1923). After leading a failed struggle of the Left Opposition against the policies and rise of Joseph Stalin in the 1920s and against the increasing role of bureaucracy in the Soviet Union, Trotsky was removed from power (October 1927), expelled from the Communist Party (November 1927), and finally deported from the Soviet Union in 1929. As the head of the Fourth International, Trotsky continued in exile in Mexico to oppose the Stalinist bureaucracy in the Soviet Union. He was assassinated on Stalin's orders in August 1940.