Meanwhile, beginning in the fall of 1939, Nazi officials selected around 70,000 Germans institutionalized for mental illness or disabilities to be gassed to death in the so-called Euthanasia Program. After prominent German religious leaders protested, Hitler put an end to the program in August 1941, though killings of the disabled continued in secrecy, and by 1945 some 275,000 people deemed handicapped from all over Europe had been killed. In hindsight, it seems clear that the Euthanasia Program functioned as a pilot for the Holocaust.
In autumn of 1945 a British Military Tribunal in Lüneburg tried 48 members of the Bergen-Belsen staff, including 37 SS personnel and eleven prisoner functionaries. The tribunal sentenced eleven of the defendants to death, including camp commandant Josef Kramer. Nineteen other defendants were convicted and sentenced to prison terms; the tribunal acquitted fourteen. On December 12, 1945, British military authorities executed Kramer and his co-defendants.
In spite of the Jewish "holy war" against the Nazis, there were no Jews sent to a concentration camp solely because they were Jewish during the first five and a half years that the Nazi concentration camps were in existence. Jews were sent to Dachau from day one, but it was because they were Communists or trade union leaders, not because they were Jewish. The first Jews to be taken into "protective custody," simply because they were Jews, were arrested during the pogrom on the night of November 9th & 10th in 1938, which the Nazis named Kristallnacht (Night of Broken Glass).
During the first year, the camp held about 4,800 prisoners. Initially the internees were primarily German Communists, Social Democrats, trade unionists, and other political opponents of the Nazi regime. Over time, other groups were also interned at Dachau, such as Jehovah's Witnesses, Roma (Gypsies), homosexuals, as well as "asocials" and repeat criminal offenders. During the early years relatively few Jews were interned in Dachau and then usually because they belonged to one of the above groups or had completed prison sentences after being convicted for violating the Nuremberg Laws of 1935.
After 1945 the name was applied to the displaced persons camp established nearby, but it is most commonly associated with the concentration camp. From 1941 to 1945, almost 20,000 Soviet prisoners of war and a further 50,000 inmates died there. Overcrowding, lack of food and poor sanitary conditions caused outbreaks of typhus, tuberculosis, typhoid fever and dysentery, leading to the deaths of more than 35,000 people in the first few months of 1945, shortly before and after the liberation.