In May 1944, Martin Gottfried Weiss was appointed the department head of the Office Group D in the SS Main Office of Economic Administration (WVHA) at Oranienburg. That same year, Weiss became the commander of the five sub-camps of Dachau at Mühldorf; when the Mühldorf prisoners were evacuated and brought to the main camp in the Spring of 1945, Weiss returned to Dachau. Fourteen members of the staff at Mühldorf were put on trial at Dachau from April 1 through May 13, 1947 in the case of US vs. Franz Auer et al.
From 1933 until 1938, most of the people held in concentration camps were political prisoners and people the Nazis labeled as "asocial." These included the disabled, the homeless, and the mentally ill. After Kristallnacht in 1938, the persecution of Jews became more organized. This led to the exponential increase in the number of Jews sent to concentration camps.
As Allied forces advanced toward Germany, the Germans began to more prisoners from concentration camps near the front to prevent the liberation of large numbers of prisoners. Transports from the evacuated camps arrived continuously at Dachau, resulting in a dramatic deterioration of conditions. After days of travel, with little or no food or water, the prisoners arrived weak and exhausted, near death. Typhus epidemics became a serious problem due to overcrowding, poor sanitary conditions, and the weakened state of the prisoners.
In August 1944, a new section was created and this became the so-called "women's camp". By November 1944 this camp received around 9,000 women and young girls. Most of those who were able to work stayed only for a short while and were then sent on to other concentration camps or slave-labour camps. The first women interned there were Poles, arrested after the failed Warsaw Uprising. Others were Jewish women from Poland or Hungary, transferred from Auschwitz. Among those who never left Bergen-Belsen were Margot and Anne Frank, who died there in February or March 1945.
By October 1944, there was a shortage of coal in all of Germany and the dead could no longer be cremated. A new cemetery was opened on a hill north of the camp, called Leitenberg, where the last Dachau victims were buried in unmarked mass graves. Ashes of earlier unknown victims are buried in the area north of the new crematorium. Markers were placed on the sites of the mass graves of ashes between 1950 and 1964.
Because they refused to pledge allegiance to the Nazi party or serve in the military, Jehovah's Witnesses were sent to concentration camps, where they were identified by purple triangles and given the option of renouncing their faith and submitting to the state's authority. The United States Holocaust Memorial Museum estimates that between 2,700 and 3,300 were sent to the camps, where 1,400 died; in The Holocaust Encyclopedia (2001), Sybil Milton estimates that 10,000 were sent and 2,500 died. According to German historian Detlef Garbe, "no other religious movement resisted the pressure to conform to National Socialism with comparable unanimity and steadfastness."
Peter Hayes (How Was It Possible? A Holocaust Reader, 2015): "The Holocaust, the Nazi attempt to eradicate the Jews of Europe, has come to be regarded as the emblematic event of Twentieth Century ... Hitler's ideology depicted the Jews as uniquely dangerous to Germany and therefore uniquely destined to disappear completely from the Reich and all territories subordinate to it. The threat posted by supposedly corrupting but generally powerless Sinti and Roma was far less, and therefore addressed inconsistently in the Nazi realm. Gay men were defined as a problem only if they were German or having sex with Germans or having sex with Germans and considered 'curable' in most cases. ... Germany's murderous intent toward the handicapped inhabitants of European mental institutions ... was more comprehensive ... but here, too, implementation was uneven and life-saving exceptions permitted, especially in Western Europe. Not only were some Slavs—Slovaks, Croats, Bulgarians, some Ukrainians—allotted a favored place in Hitler's New Order, but the fate of most of the other Slavs the Nazis derided as sub-humans ... consisted of enslavement and gradual attrition, not the prompt massacre meted out to the Jews after 1941."
In 1935 the Wehrmacht began to build a large military complex close to the village of Belsen, a part of the town of Bergen, in what was then the Province of Hanover. This became the largest military training area in Germany of the time and was used for armoured vehicle training. The barracks were finished in 1937. The camp has been in continuous operation since then and is today known as Bergen-Hohne Training Area. It is used by the NATO armed forces.