Factions of the Russian Social Democratic Labour Party

In the course of the history of the Russian Social Democratic Labour Party (RSDLP between 1898 and 1918), several political factions developed, as well as the major split between the Bolsheviks and the Mensheviks. == Bolsheviks and Mensheviks == Formed in 1903 from the major split in the RSDLP—which also produced the Mensheviks—the Bolshevik faction followed Vladimir Lenin, and organised a separate party, the Russian Social Democratic Workers Party, aka Russian Social Democratic Labour Party (Bolsheviks), in 1912.

Source: Wikipedia — Factions of the Russian Social Democratic Labour Party (CC BY-SA 4.0)