In March 1944, the former SS depot was converted to a new subcamp, named Gusen II, which served as an improvised concentration camp until the end of the war. Gusen II contained about 12,000 to 17,000 inmates, who were deprived of even the most basic facilities. In December 1944, Gusen III was opened in nearby Lungitz. Here, parts of a factory infrastructure were converted into the third Gusen camp. The rise in the number of subcamps could not catch up with the rising number of inmates, which led to overcrowding of the huts in Mauthausen and its subcamps. From late 1940 to 1944, the number of inmates per bed rose from two to four.