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The October Revolution (also known as the Great October Socialist Revolution, the Bolshevik Revolution, or simply the Russian Revolution) was a socialist revolution which took place in the Russian bourgeois republic on 7 November 1917, following the abdication of Tsar Nicholas Romanov and the establishment of the Russian Provisional Government in March 1917. Brought on by the popular support for the Bolsheviks led by Vladimir Lenin and the failure of the Provisional Government to exit the First World War, the situation of dual power between the government and the worker-led Soviets led to the overthrow of the state and the establishment of the Russian Soviet Federative Socialist Republic (RSFSR) in the same year.

It received massive international attention at the time and initiated the events of the Russian Civil War, provoking military interventions from the United States, United Kingdom and other countries. Key eyewitnesses to the event include John Reed. Source: https://en.prolewiki.org/wiki/Russian_revolution_of_1917