The prisoners are kept occupied at hard labor, building roads and laying out drilling and shooting grounds. Some of the prisoners were harnessed for weeks to a heavy roller which they had to tow nine hours a day without a rest period. Others were compelled to stand the whole day in cold water excavating quagmire to lay the foundation for a swimming pool for the guards. The work was continually speeded up by lashing and kicking the prisoners, and many times men collapsed and had to be carried back to the camp for a short rest.
German students over the age of 12 are required to tour a concentration camp as part of the on-going education of the present generation of German citizens in the evil perpetrated by the Nazi regime over 60 years ago. German soldiers are also required to tour the former concentration camps. Most visitors associate Dachau with the death of 6 million Jews in the Holocaust, although the majority of the inmates at Dachau were Catholics.
Dachauers have accepted the fact that their town will always be reviled as the home of the best-known Nazi concentration camp, but they are sometimes resentful that the town of Dachau is always associated with Nazi atrocities. They refer to the town itself as "the other Dachau." They have pretty much given up trying to persuade tourists to visit the town, since the Holocaust is the only thing that attracts visitors to Dachau today.
SS-Hauptsturmführer Adolf Haas became the first commandant of the Bergen-Belsen camp in the spring of 1943; SS-Hauptsturmführer Josef Kramer replaced him in December 1944. The number of SS functionaries in Bergen-Belsen varied over the course of the camp's existence. The SS succeeded in destroying many of the camp's files, including those on personnel.
At first a single barrack accommodated only 180 persons, but later the overcrowding became intolerable, and bunks filled all available space. At the north end of Dachau stood the disinfection buildings and an Angora rabbit farm. The camp had a unique feature, the Dachau museum, containing plaster-images of prisoners marked by bodily defects or other strange characteristics.
The number of prisoners incarcerated in Dachau between 1933 and 1945 exceeded 188,000. The number of prisoners who died in the camp and the subcamps between January 1940 and May 1945 was at least 28,000, to which must be added those who perished there between 1933 and the end of 1939. It is unlikely that the total number of victims who died in Dachau will ever be known.
In October 1939 Hitler signed a "euthanasia decree" backdated to 1 September 1939 that authorized Reichsleiter Philipp Bouhler, the chief of Hitler's Chancellery, and Karl Brandt, Hitler's personal physician, to carry out a program of involuntary "euthanasia"; after the war this program was named Aktion T4. It was named after Tiergartenstraße 4, the address of a villa in the Berlin borough of Tiergarten, where the various organizations involved were headquartered. T4 was mainly directed at adults, but the "euthanasia" of children was also carried out. Between 1939 and 1941, 80,000 to 100,000 mentally ill adults in institutions were killed, as were 5,000 children and 1,000 Jews, also in institutions. In addition there were specialized killing centres, where the deaths were estimated at 20,000, according to Georg Renno, the deputy director of Schloss Hartheim, one of the "euthanasia" centers, or 400,000, according to Frank Zeireis, the commandant of the Mauthausen concentration camp. Overall, the number of mentally and physically handicapped murdered was about 150,000.
Prisoners were divided into categories. At first, they were classified by the nature of the crime for which they were accused, but eventually were classified by the specific authority-type under whose command a person was sent to camp.:53 Political prisoners who had been arrested by the Gestapo wore a red badge, "professional" criminals sent by the Criminal Courts wore a green badge, Cri-Po prisoners arrested by the criminal police wore a brown badge, "work-shy and asocial" people sent by the welfare authorities or the Gestapo wore a black badge, Jehovah's Witnesses arrested by the Gestapo wore a violet badge, homosexuals sent by the criminal courts wore a pink badge, emigrants arrested by the Gestapo wore a blue badge, "race polluters" arrested by the criminal court or Gestapo wore badges with a black outline, second-termers arrested by the Gestapo wore a bar matching the color of their badge, "idiots" wore a white armband with the label Blöd (Stupid), and Jews, whose incarceration in the Dachau concentration camp dramatically increased after Kristallnacht, wore a yellow badge, combined with another color.:54–69
In April 1943, a part of the Bergen-Belsen camp was taken over by the SS Economic-Administration Main Office (SS Wirtschafts-Verwaltungshauptamt; WVHA). It thus became part of the concentration camp system, run by the SS Schutzstaffel but it was a special case. Having initially been designated a Zivilinterniertenlager ("civilian internment camp"), in June 1943 it was redesignated Aufenthaltslager ("holding camp"), since the Geneva Conventions stipulated that the former type of facility must be open to inspection by international committees. This "holding camp" or "exchange camp" was for Jews who were intended to be exchanged for German civilians interned in other countries, or for hard currency. The SS divided this camp into subsections for individual groups (the "Hungarian camp", the "special camp" for Polish Jews, the "neutrals camp" for citizens of neutral countries and the "Star camp" for Dutch Jews). Between the summer of 1943 and December 1944 at least 14,600 Jews, including 2,750 children and minors were transported to the Bergen-Belsen "holding" or exchange camp.:160 Inmates were made to work, many of them in the "shoe commando" which salvaged usable pieces of leather from shoes collected and brought to the camp from all over Germany and occupied Europe. In general the prisoners of this part of the camp were treated less harshly than some other classes of Bergen-Belsen prisoner until fairly late in the war, due to their perceived potential exchange value. However, only around 2,560 Jewish prisoners were ever actually released from Bergen-Belsen and allowed to leave Germany.