On 11 November 1940 Kupfer-Koberwitz was committed to
Dachau concentration camp by the
Gestapo and from November 1942 was a clerk in a Dachau
satellite camp that provided slave labor for the
Präzifix Screw Factory , an armaments industry. During this time, at risk to his life, from 20 November 1942 to 2 May 1945 he wrote the manuscript known as the
Dachau Diaries, which would ultimately run to 1800 pages. While writing it within the camp, he hid it in various locations and finally buried it in October 1944, wrapped in layers of aluminum, fabric and oil cloth to help preserve it. Kupfer-Koberwitz led American forces to the location of his diaries a week after they had liberated the Dachau camp on 29 April 1945. The diary, although damp, had largely survived. Two years later it would be used as evidence during the
Nuremberg Trials. ==Post-war==