The Gulag was a system of forced labor camps in the Soviet Union. The term originally referred to the government agency that oversaw the camps.
Experiences of the Gulag
Nobel Prize winner and author Alexander Solzhenitsyn described the horrors of the Gulag in his collection of documents entitled The Gulag Archipelago. Solzhenitsyn experienced the savagery of the Gulag, and shocked the world with his writings that outlined his chronicles of the camps.Sky News: Russian Gulag Chronicler Dies (August 4, 2008)