What were the extermination camps? When did they start to function, and what was their purpose?

The first camp specifically established as an extermination camp was at Chelmno (Kulmhof), Poland. It began to function on December 8, 1941, when Jews from the surrounding area were brought there. At first, gas vans were used for the murder. Eventually, approximately 320,000 people, mostly Jews, were murdered there.

Early in 1942 the Nazis began to build three extermination camps in the framework of Operation (Aktion) Reinhard: Belzec, Sobibor, and Treblinka. Most of the Jews from Poland were murdered in these camps in 1942 and 1943. All told, about 1.7 million Jews were murdered in the Reinhard camps. Majdanek, which was a concentration-labor camp, also had a killing center and is often cited as an extermination camp. Unlike in the Operation Reinhard camps, many of the victims of Majdanek were not Jews.

The most infamous of the extermination camps was established at Auschwitz. It began to function as an extermination camp in the spring of 1942, after larger gas chambers were built in nearby Birkenau (Auschwitz II). Eventually, more than a million Jews and several hundred thousand Poles, Sinti and Roma, and people of various nationalities were murdered there.

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