With the Bolshevik Red Army under Leon Trotsky defeating the coalition of anti-communist pro-Czarist and democratic socialists White Armies and others during the Russian Civil War of 1917–1922 , the RSFSR became the chief dominating constituent republic of the formation of the larger Soviet Union ( USSR ) in December 1922.The Bolsheviks , founded by Vladimir Lenin ( 1870-1924 ) , and Alexander Bogdanov ( 1873-1928 ) , were by 1905 a major political organization consisting primarily of workers under a democratic internal hierarchy governed by the principle of democratic centralism , who considered themselves the leaders of the revolutionary working class of Russia .
Leon Trotsky was born in 1879 and died in 1940 .