 Complete the following phrase:  After the October Revolution, he served in the Red Fleet, took part in the suppression of the KerenskyKrasnov Uprising in Petrograd, which lasted from October 26 to October 31, 1917. From October 25 to 27 was a member of the Second All-Russian Congress of Soviets of Workers and Soldiers Deputies. He also served as chairman of the Naval Revolutionary Committee and head of the military-political department of the Supreme Maritime College. On April 10, 1918 he was appointed Deputy Peoples Commissar for Maritime Affairs of the Russian Socialist Federative Soviet Republic. On June 18, 1918 he took part in the flooding of the Black Sea Fleet in the Tsemes Bay, and served as chairman of the Defense Council of the Arkhangelsk Region. He was one of the leaders of the 