Allied intervention in the Russian Civil War Powers to withdraw from North Russia and Siberia in 1920, though Japanese forces occupied parts of Siberia until 1922 and the northern half of Sakhalin until 1925. In 1917, Russia was in a state of political strife, and public support for World War I and the Tsar was dwindling. The country was on the brink of revolution. The February Revolution changed the course of the war; under intense political pressure, the Tsar abdicated and the Russian Provisional Government was formed, led initially by Georgy Lvov and later by Alexander Kerensky. The Provisional Government pledged to continue fighting the Germans on
NKVD (INU); GUGB political police unit represented by Secret Political Department (SPO) became Secret Political Directorate (SPU), and so on. The former GUGB 4th Department (OO) was split into three sections. One section, which handled military counter-intelligence in NKVD troops (former 11th Section of GUGB 4th Department OO) become 3rd NKVD Department or OKR (Otdel KontrRazvedki), the chief of OKR NKVD was Aleksander Belyanov.<br> After the German invasion of the Soviet Union (June 1941),the NKGB USSR was abolished and on July 20, 1941 the units that formed NKGB becomes part of NKVD USSR. The military CI was also upgraded from department