Gulag

The Gulag (Russian: ГУЛаг, GULag; ) was the Soviet Union government agency that administered the main Soviet forced labor camp systems during the Stalin era, from the 1930s through the 1950s. While the camps housed a wide range of convicts, from petty criminals to political prisoners, large numbers were convicted by simplified procedures, such as NKVD troikas and other instruments of extrajudicial punishment. The Gulag is recognized as a major instrument of political repression in the Soviet Union.