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
Thief in law culture with its own slang, culture and laws became known as "Vorovskoy Mir" () or "Criminal/Thieves World". As the police and court system were re-established in the Soviet Union shortly after the 1917 revolution, the NKVD secret police nearly exterminated the criminal underworld completely. Under Stalin, the forced labor camps (Gulag) overflowed with political prisoners and criminals, and a new organized group of top criminals arose, the "vory v zakone", or "thieves in law." The "thieves in law" formed as a society for ruling the criminal underworld within the prison camps, "who govern the dark gaps in Soviet life beyond