By its victim count, Chelmno is the smallest of the four “Aktion Reinhardt” camps, which according to orthodox historiography served as “pure extermination camps” for the mass murder of Jews by means of poison gas. Chelmno is a special case in this context, as not gas chambers, but gas vans are said to have been deployed for the mass murder. The other camps are: Belzec, Sobibór, and Treblinka.

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