The
October Revolution , officially known in the Soviet literature as the
Great October Socialist Revolution , and commonly referred to as
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 (by the
Julian or
Old Style calendar, which corresponds to 7 November 1917 in the
Gregorian or New Style calendar).