An unused black triangle badge found at the Buchenwald concentration camp after liberation in spring 1945.
In concentration camps, the Nazis marked prisoners they called “asocials” (Asozialen) with a black triangle badge on their camp uniform. These so-called “asocials” were often seen as outsiders in German society. They often did not have permanent addresses or stable jobs. The Nazi regime wrongfully imprisoned, forcibly sterilized, and, in some cases, murdered those they considered "asocials."
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