From Wikipedia:

The October Revolution, officially known as the Great October Socialist Revolution[b] under the Soviet Union, also known as the Bolshevik Coup, the Bolshevik Revolution,[2] the October Uprising, the October Coup or Red October, was a revolution in Russia led by the Bolshevik Party of Vladimir Lenin that was instrumental in the larger Russian Revolution of 1917–1923. It was the second revolutionary change of government in Russia in 1917. It took place through an armed insurrection in Petrograd (now Saint Petersburg) on 7 November 1917 [O.S. 25 October]. It was the precipitating event of the Russian Civil War.

https://en.wikipedia.org/wiki/October_Revolution