From about September 1942 to about December 1943 experiments were conducted at the Ravensbrück concentration camp, for the benefit of the German Armed Forces, to study bone, muscle, and nerve regeneration, and bone transplantation from one person to another. [citation needed] Sections of bones, muscles, and nerves were removed from the subjects without use of anesthesia. As a result of these operations, many victims suffered intense agony, mutilation, and permanent disability.