WORLD HISTORY

Detailed explanation-1: -The Gulag was a system of Soviet labour camps and accompanying detention and transit camps and prisons. From the 1920s to the mid-1950s it housed political prisoners and criminals of the Soviet Union. At its height, the Gulag imprisoned millions of people.

Detailed explanation-2: -From 1918 to 1987, Soviet Russia operated a network of hundreds of prison camps that held up to 10, 000 people each. When Stalin launched his infamous purges in 1936, millions of so-called political prisoners were arrested and transported to the gulags without trial.