A German prison guard at Amersfoort concentration camp uses a hose to douse four inmates with cold water. Amersfoort was a transit camp and during the years of 1941 to 1945, over 35,000 prisoners were housed there. During the period between 1943 and 1945, 26,500 people were imprisoned, of which 18,000 were sent east to places like Buchenwald and Natzweiler concentration camps. Amersfoort concentration camp, Amersfoort, Utrecht, Netherlands. September 1943.