Vladimir Lenin was the leader of the Russian Bolshevik Party during the October Revolution in 1917. As the principal architect of the Bolshevik uprising, Lenin aimed to overthrow the provisional government that had replaced the Tsar. His leadership and the ideology of Marxism-Leninism were pivotal in the success of the revolution, leading to the establishment of a socialist state. Lenin's role in the Bolshevik Party and the subsequent civil war positioned him as the head of the new Soviet government, profoundly influencing global politics and the course of the 20th century.