Chronology of Soviet secret police agencies to operate as well. Chronology of Soviet secret police agencies <br> There was a succession of Soviet secret police agencies over time. The first secret police after the October Revolution, created by Vladimir Lenin's decree on December 20, 1917, was called "Cheka" (ЧК). Officers were referred to as "chekists", a name that is still informally applied to people under the Federal Security Service of Russia, the KGB's successor in Russia after the dissolution of the Soviet Union. For most agencies listed here secret policing operations were only part of their function; for instance, the KGB was both the secret police
NKVD troika NKVD troika NKVD troika or Special troika (), in Soviet history, were the People's Commissariat of Internal Affairs (NKVD which would later be the beginning of the KGB) of three persons who issued sentences to people after simplified, speedy investigations and without a public and fair trial. The three members were judge and jury, though they themselves did not carry out the sentences they dealt. These commissions were employed as instruments of extrajudicial punishment introduced to supplement the Soviet legal system with a means for quick and secret execution or imprisonment. It began as an institution of the Cheka, then