Bolsheviks
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The Bolsheviks, led by Vladimir Lenin, were a far-left faction of the Marxist Russian Social Democratic Labour Party which split with the Mensheviks at the Second Party Congress in 1903. Wikipedia
Founded: 1903, Brussels, Belgium
Founders: Vladimir Lenin and Alexander Bogdanov
Formerly called: "hards"
Headquarters: Varied
Parent organization: Russian Social Democratic Labour Party
Successor: Russian Communist Party (Bolsheviks)