Natzweiler-Struthof was the only concentration camp established by the Nazis on French territory. It was operational between May 21, 1941 until the beginning of September 1944 when the SS evacuated the camp. The camp was liberated by the Americanss on November 23, 1944.
The total number of prisoners reached estimated 40,000 originating from various countries including Poland, the Soviet Union, Netherlands, France, Germany, Norway. The camp was mainly a labour camp but it also held a gas chamber and crematorium. Strenous work, poor nutrition and mistreatment by the SS guards resulted in an estimated 25,000 deaths. Among those who died here were four women executed together on July 6, 1944. The women were SOE agents Diana Rowden, Vera Leigh, Andrée Borrel and Sonya Olschanezky.
Between April 9 and May 5 of 1946, the British held a war crimes trial at Wuppertal, Germany for those in charge of Natzweiler-Struthof. The commandant and five others were tried and all of the accused were found guilty of which three were sentenced to death. SOE agent Brian Stonehouse and PAT Line operator Albert Guerisse testified that while being held prisoner there, they had seen the four female SOE agents who were executed.
The sentence of commandant Fritz Hartjenstein was eventually commutted to life imprisonment while two were hanged on October 11, 1946. Those tried were: