Tuol Sleng Genocide Museum - "Skull map"

The buildings at Tuol Sleng are preserved, some rooms as they were left when the Khmer Rouge were driven out in 1979. The regime kept extensive records, including thousands of photographs. Several rooms of the museum are now lined, floor to ceiling, with black and white photographs of some of the estimated 20,000 prisoners who passed through the prison.

The site has four main buildings, known as Building A, B, C, and D. Building A holds the large cells in which the bodies of the last victims were discovered. Building B holds galleries of photographs. Building C holds the rooms sub-divided into small cells for prisoners. Building D holds other memorabilia including instruments of torture.

Caisson: (pronounced kay-suhn) �" A two-wheeled cart that carried two ammunition chests, tools, and a spare wheel for artillery pieces. The caisson could be attached to a limber, which would allow both to be pulled by a team of horses.

Infantry: A branch of the military in which soldiers traveled and fought on foot.

Rebel Yell: A high-pitched cry that Confederate soldiers would shout when attacking. First heard at First Manassas (First Bull Run) Union troops found the eerie noise unnerving.

Corps: (pronounced kohr or korz) A very large group of soldiers led by (Union) a major general or (Confederate) a lieutenant general and designated by Roman numerals (such as XI Corps). Confederate corps were often called by the name of their commanding general (as in Jackson's Corps). 1 company = 50 to 100 men, 10 companies = 1 regiment, about 4 regiments = 1 brigade, 2 to 5 brigades = 1 division, 2 or more divisions = 1 corps, 1 or more corps = 1 army.

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.