The NKVD was an acronymn for the Narodnyy Komissariat Vnutrennikh Del, which translates to the Peoples Commissariat for Internal Affairs. It was formed in 1934 and disbanded in 1946.
The NKVD was the police force in the Soviet Union during Stalins administration, which contained both the public police force such as traffic and border guards, the secret police known for the "purges", as well as the police force which managed the gulags, executions and foreign affairs.
Evidential standards for arrest were very low, and physical torture was permitted during the process.
The term GULAG is an acronymn for Glavnoye Upravlyeniye Ispravityel'no-Trudovih Lagyeryey i koloniy, which translates from Russian to The Chief Administration for Corrective Labour Camps and Colonies.
There were approximately 500 of these camps, with some located in the arctic regions of the Soviet Union.
Over 14 million people were committed to Russian gulags from 1929 to 1953, and over half of them were committed without trial.