Bolsheviks

Faction of the Russian Social Democratic Labour Party

The Bolsheviks, led by Vladimir Lenin, were a far-left faction of the Marxist Russian Social Democratic Labour Party (RSDLP) which split with the Mensheviks at the Second Party Congress in 1903. The Bolshevik party, formally established in 1912, seized power in Russia in the October Revolution of 1917, and was later renamed the Russian Communist Party, All-Union Communist Party, and Communist Party of the Soviet Union. The party's ideology, based on Leninist and later Marxist–Leninist principles, is known as Bolshevism.

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