When it comes to the “Holocaust,” terms like “gas chambers” or “gas ovens” dominate the public’s imagination. “Gas vans” are usually absent from the discourse. What percentage of the general populace has ever heard that the Nazis are said to have deployed mobile gas chambers as well, which historians usually call “gas vans”? This lack of knowledge is excusable, because even in orthodox historiography the “gas vans” have played only a minor role. This entry lists contributions dealing with these pernicious – or merely imagined? – devices of mass murder allegedly deployed behind the Russian front, in Serbia and at the Chelmno camp (see also there).