The Partido Bolchevique, or Bolshevik Party, was a revolutionary political party in Russia, founded in 1903 as a faction of the Russian Social Democratic Labor Party. Led by Vladimir Lenin, the party advocated for a socialist revolution and aimed to establish a government representing the working class. The Bolsheviks gained significant influence during the Russian Revolution of 1917, ultimately seizing power in October of that year. They established a one-party state, leading to the creation of the Soviet Union in 1922. The party played a crucial role in shaping 20th-century politics and ideology.