 The Leningrad Military District was originally formed as the Petrograd Military District after the October Revolution of 1917 up to the beginning of the formation of the Red Army.The Petrograd District was established as a part of the Red Army (RKKA) by order в"– 71 of the Highest Military Council of 6 September 1918.On 1 February 1924, by the order в"– 126 the Revolutionary Military Councils of the USSR the Petrograd military district was renamed the Leningrad Military District.