The political result of the Russian Revolution in 1917 was the overthrow of the Tsarist autocracy and the establishment of a communist government led by the Bolsheviks. The February Revolution prompted the abdication of Tsar Nicholas II, leading to a provisional government. However, the more radical October Revolution, led by Vladimir Lenin, resulted in the Bolsheviks seizing power. This transformation marked the beginning of Soviet rule and the eventual establishment of the Union of Soviet Socialist Republics (USSR) in 1922. The revolution fundamentally changed Russia's political landscape, society, and its role in global affairs, leading to the spread of communism worldwide.