The October Revolution, also known as the Great October Socialist Revolution, Red October, the October Uprising or the Bolshevik Revolution, was a seizure of state power instrumental in the larger Russian Revolution of 1917. It took place with an armed insurrection in Petrograd traditionally dated to 25 October 1917 Old Style Julian Calendar (O.S.), which corresponds with 7 November 1917 New Style (N.S.) Gregorian Calendar. Read more