prison camp

noun

a camp for the confinement of prisoners of war or political prisoners.
a camp for less dangerous prisoners assigned to outdoor work, usually for the government.

Origin of prison camp

First recorded in 1905–10

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

The sanitary conditions in this prison-camp were excellent as a general proposition.
Outwitting the Hun
Pat O'Brien
News of the trouble in Ireland sifted through to us in the prison-camp.
Three Times and Out
Nellie L. McClung
It was September 25th that we left the prison-camp and came to Rossbach—eighteen miles south on the railway.
Three Times and Out
Nellie L. McClung
In the prison-camp the word "friend" has an active and positive quality in it which it sometimes lacks in normal times.
Three Times and Out
Nellie L. McClung
Among the major's letters was one which had been forwarded from his brother Titus, then in a prison-camp in the North.
A Lieutenant at Eighteen
Oliver Optic