During the first three weeks the camp was under the command of the regular police fore. Then the Nazis appeared one night to take over control. Their leader made a speech to his followers, of which the following quotations are of interest: “Always remember that no human beings are here, only swine.”—“Whoever does not wish to see blood may go home immediately.”—“No one who does harm to a prisoner need fear reprimand.”—“The more you shoot, the fewer we must feed.”
Jehovah's Witnesses, homosexuals, and emigrants were sent to Dachau after the 1935 passage of the Nuremberg Laws which institutionalized racial discrimination. In early 1937, the SS, using prisoner labor, initiated construction of a large complex capable of holding 6,000 prisoners. The construction was officially completed in mid-August 1938. More political opponents, and over 11,000 German and Austrian Jews were sent to the camp after the annexation of Austria and the Sudetenland in 1938. Sinti and Roma in the hundreds were sent to the camp in 1939, and over 13,000 prisoners were sent to the camp from Poland in 1940.
In many instances, their imprisonment was a result of the emergency decree that Adolf Hitler proposed and President Paul Von Hindenberg approved on February 28, 1933. The Decree for the Protection of the People and the State (commonly called the Reichstag Fire Decree) suspended the civil rights of German civilians and prohibited the press from publishing anti-government materials.
The most notorious physician was Josef Mengele, an SS officer who became the Auschwitz camp doctor on 30 May 1943. Interested in genetics and keen to experiment on twins, he would pick out subjects from the new arrivals during "selection" on the ramp, shouting "Zwillinge heraus!" (twins step forward!). They would be measured, killed, and dissected. One of Mengele's assistants said in 1946 that he was told to send organs of interest to the directors of the "Anthropological Institute in Berlin-Dahlem". This is thought to refer to Mengele's academic supervisor, Otmar Freiherr von Verschuer , director from October 1942 of the Kaiser Wilhelm Institute of Anthropology, Human Heredity, and Eugenics in Berlin-Dahlem.[i] Mengele's experiments included placing subjects in pressure chambers, testing drugs on them, freezing them, attempting to change their eye color by injecting chemicals into children's eyes, and amputations and other surgeries.
In the 1930s, the political landscape of Europe changed dramatically with the rise of Adolf Hitler and the German Nazi Party. Sensing the shift in political momentum, Schindler joined a local pro-Nazi organization and began collecting intelligence for the German military. He was arrested by Czech authorities in 1938, charged with spying and sentenced to death but was released shortly thereafter, when Germany annexed the Sudetenland. Schindler would take advantage of this second chance.
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.