Tuol Sleng Genocide Museum - History

In 1979, the prison was uncovered by the invading Vietnamese army. At some point between 1979 and 1980 the prison was reopened by the government of the People's Republic of Kampuchea as a historical museum memorializing the actions of the Khmer Rouge regime.

Offensive: Actively attacking someone.

Parrott gun: A rifled artillery piece with a reinforcing band at the rear, or breech. Parrott guns were used by both the Army and the Navy, and ranged from 10-pounders to 300-pounders. They were named after their designer, Robert Parker Parrott.

Napoleon Gun: Another name for the Model 1857 gun howitzer. This lighter, more maneuverable field artillery piece fired 12 pound projectiles and was very popular with both Federal and Confederate armies.

Havelock: (pronounced hav-loc) A white cloth cover that went over a soldier's kepi, and had a long back that covered a soldier's neck and shoulders. Although it saw use in the early stages of the war, soldiers quickly learned that it cut off circulation around the head and face, leading to the eventual abandonment of the havelock.

Defeat in Detail: Defeating a military force unit by unit. This occurred when units were unable to support one another, often because of distance.