Holocaust Timeline: The Camps

http://fcit.usf.edu/HOLOCAUST/TIMELINE/camps.htm
Summary: "In the beginning of the systematic mass murder of Jews, Nazis used mobile killing squads called Einsatzgruppen.The Einsatzgruppen consisted of four units of between 500 and 900 men each which followed the invading German troops into the Soviet Union."
"There were concentration camps, forced labor camps, extermination or death camps, transit camps, and prisoner-of-war camps. The living conditions of all camps were brutal."

Pictures (of Einsatzgruppen, and concentration camps, etc.)