The October Revolution, also known as the Great October Socialist Revolution as the official term in the Soviet Union, Bolshevik Coup, the Bolshevik Revolution, 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 took place through an armed insurrection in Petrograd (now St. Petersburg) on 25 October (Old Style, O.S.; 7 November, New Style or N.S.) 1917. It was the precipitating event of the Russian Civil War.