
1) Penal imprisonment
Found on
https://www.crosswordclues.com/clue/military-prison

A military prison is a prison operated by the military. Military prisons are used variously to house prisoners of war, enemy combatants, those whose freedom is deemed a national security risk by the military or national authorities, and members of the military found guilty of a serious crime. Thus military prisons are of two types: penal, for puni...
Found on
http://en.wikipedia.org/wiki/Military_prison
No exact match found.