 The Military District was tasked with defending the northern borders of the USSR.Simultaneously the Belomorsky Military District executed formation and preparation of reserve formations and units for the active army.Just after the war, the district included under its command the 4th Rifle Corps (Arkhangelsk) (25th and 289th Rifle Divisions); 31st Rifle Corps (Murmansk) (45th, 67th, and 83rd (both the last located at Murmansk)) and the 131st Rifle Corps (Petrozavodsk) (114th, 341st, and 367th Rifle Divisions, Rebol, Alakurtti, and Sortavala).