The Steyr-Münichholz concentration camp was one in a number of subcamps of the Mauthausen-Gusen concentration camp in Upper Austria. Inmates were drawn from the main camp, in order to exploit their labor for producing arms in Steyr-Daimler-Puch corporation factories, and to build air-raid bunkers in the town of Steyr. The establishment of a subcamb on the premises of a detention facility in nearby Garsten was opposed by the prison administration. Therefore a makeshift camp was established in the vicinity of the factory premises in spring 1942. The camp was liberated by US troops on May 5, 1945.