Tuol Sleng Genocide Museum - Torture and extermination

For the first year of S-21's existence, corpses were buried near the prison. However, by the end of 1976, cadres ran out of burial spaces, the prisoner and family members were taken to the Boeung Choeung Ek ("Crow's Feet Pond") extermination centre, fifteen kilometers from Phnom Penh. There, they were killed by a group of teenagers led by a Comrade Teng, being battered to death with iron bars, pickaxes, machetes and many other makeshift weapons owing to the scarcity and cost of ammunition. After the prisoners were executed, the soldiers who had accompanied them from S-21 buried them in graves that held as few as 6 and as many as 100 bodies.

"Infernal Machine": A term of contempt for torpedoes (either the land or the water variety). This term was also used to describe the Confederate vessel H.L. Hunley- the first successful submarine.

Fieldworks: Temporary fortifications put up by an army in the field.

Sortie: A type of counter-attack used to disrupt the enemy's attack or siege of a fortification, causing the enemy to divert some of its resources away from the initial attack or siege.

South: Also called the Confederacy, the Confederate States of America, or (by Northerners) the Rebel states, the South incorporated the states that seceded from the United States of America to form their own nation. Southern states were: Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas, and Virginia.

Ordnance: The term used for military supplies, such as weaponry and ammunition.