Leon Trotsky[a] (/'tr?tski/; Russian: ??? ????´????? ???´????; pronounced ['l??f 'trotsk??j] (About this sound listen); born Lev Davidovich Bronstein;[b] 7 November [O.S. 26 October] 1879 – 21 August 1940) was a Marxist revolutionary, theorist, and Soviet politician. Initially supporting the Menshevik Internationalists faction within the Russian Social Democratic Labour Party, he joined the Bolsheviks ("majority") just before the 1917 October Revolution, immediately becoming a leader within the Communist Party. He would go on to become one of the seven members of the first Politburo, founded in 1917 to manage the Bolshevik Revolution. During the early days of the Russian Soviet Federative Socialist Republic (RSFSR) and the Soviet Union, he served first as People's Commissar for Foreign Affairs and later as the founder and commander of the Red Army, with the title of People's Commissar of Military and Naval Affairs. He became a major figure in the Bolshevik victory in the Russian Civil War (1918–1923).