In October Eremeev returned to Petrograd and participated in the formation of the Red Guard detachments, and led the revolutionary agitation in the garrison units. He was a member of the Petrograd Military Revolutionary Committee and on October 24 he headed the headquarters of a group of revolutionary troops. On October 25, he was introduced to the Field Headquarters of the Petrograd Military Revolutionary Committee, commanded detachments of the Red Guard and revolutionary soldiers during the storming of the Winter Palace from the Field of Mars. Took part in the liquidation of the Kerensky-Krasnov mutiny as the commissar of the group of Lieutenant Colonel Mikhail Muravyev and participated in the arrest of General Pyotr Krasnov. In early November, he was sent at the head of a combined detachment of revolutionary forces to help the armed uprising in Moscow.