Answer: gulags

AnswerCrossword Clue
GULAGSSoviet labor camps
GULAGSPrison camps
GULAGSLabor camps
gulagsGULAG, a forced-labour camp in the Soviet Union
gulagsSoviet forced-labor camp
gulagsany prison or detention camp, esp. for political prisoners
gulagsthe system of forced-labor camps in the Soviet Union