In September 1939, the SS transferred 1,000 political prisoners to Flossenbürg from Dachau in order to clear the latter camp to train the first regiment of the Waffen-SS. These prisoners, who were the first political prisoners at Flossenbürg, were moved back to Dachau in March 1940. The first foreign prisoners were transferred to the camp by the Gestapo in April, including Czech student protestors and Polish resistance members. The vast majority of the new foreign prisoners were incarcerated due to their opposition to the Nazi regime; a few of them were Jews. Most of the Jewish political prisoners were executed or died shortly after arriving from mistreatment. The last twelve surviving Jews were deported to Auschwitz on 19 October 1942, pursuant to Himmler's order to make the Reich "Judenrein".