Never one to miss a chance to make money, he marched into Poland on the heels of the SS. He dived headfirst into the black-market and the underworld and soon made friends with the local Gestapo bigwigs, softening them up with women, money and illicit booze. His newfound connections helped him acquire a factory which he ran with the cheapest labor around: Jewish.
The Nazis then combined their racial theories with the evolutionary theories of Charles Darwin to justify their treatment of the Jews. The Germans, as the strongest and fittest, were destined to rule, while the weak and racially adulterated Jews were doomed to extinction. Hitler began to restrict the Jews with legislation and terror, which entailed burning books written by Jews, removing Jews from their professions and public schools, confiscating their businesses and property and excluding them from public events. The most infamous of the anti-Jewish legislation were the Nuremberg Laws, enacted on September 15, 1935. They formed the legal basis for the Jews' exclusion from German society and the progressively restrictive Jewish policies of the Germans.
German communists, socialists and trade unionists were among the earliest opponents of the Nazis and among the first to be sent to concentration camps. Before the invasion of the Soviet Union, Hitler issued the Commissar Order, which ordered the execution of all political commissars and Communist Party members captured. Nacht und Nebel ("Night and Fog") was a directive of Hitler in December 1941, resulting in the disappearance of political activists throughout the German-occupied territories.
After the takeover of Bavaria on 9 March 1933, Heinrich Himmler, then Chief of Police in Munich, began to speak with the administration of an unused gunpowder and munitions factory. He toured the site to see if it could be used for quartering protective-custody prisoners. The Concentration Camp at Dachau was opened 22 March 1933, with the arrival of about 200 prisoners from Stadelheim Prison in Munich and the Landsberg fortress (where Hitler had written Mein Kampf during his imprisonment). Himmler announced in the Münchner Neuesten Nachrichten newspaper that the camp could hold up to 5,000 people, and described it as "the first concentration camp for political prisoners" to be used to restore calm to Germany. It became the first regular concentration camp established by the coalition government of the National Socialist German Worker's Party (Nazi Party) and the German National People's Party (dissolved on 6 July 1933).
The camp of Bergen-Belsen, located near the towns of Bergen and Belsen in Saxony, northern Germany, got its start in 1940 as a P.O.W. camp for French and Belgian prisoners. In 1941, the camp was renamed Stalag 311 and housed some 20,000 Russian prisoners. Conditions were terrible, resulting by 1942 in the deaths of 16,000 to 18,000 prisoners from disease, starvation and exposure.
Auschwitz, perhaps the most notorious and lethal of the concentration camps, was actually three camps in one: a prison camp (Auschwitz I), an extermination camp (Auschwitz II–Birkenau), and a slave labour camp (Auschwitz III–Buna-Monowitz). Upon arrival, Jewish prisoners faced what was called a Selektion. A German doctor presided over the selection of pregnant women, young children, the elderly, handicapped, sick, and infirm for immediate death in the gas chambers. As necessary, the Germans selected able-bodied prisoners for forced labour in the factories adjacent to Auschwitz, where one German company, IG Farben, invested 700 million Reichsmarks in 1942 alone to take advantage of forced labour, a capital investment. The conglomerate presumed that slave labour would be a permanent part of the German economy. Deprived of adequate food, shelter, clothing, and medical care, these prisoners were literally worked to death. Periodically, they would face another Selektion. The Nazis would transfer those unable to work to the gas chambers of Birkenau.
To concentrate and monitor the Jewish population as well as to facilitate later deportation of the Jews, the Germans and their collaborators created ghettos, transit camps, and forced-labor camps for Jews during the war years. The German authorities also established numerous forced-labor camps, both in the so-called Greater German Reich and in German-occupied territory, for non-Jews whose labor the Germans sought to exploit.
There were massive efforts to help the survivors with food and medical treatment, led by Brigadier Glyn Hughes, Deputy Director of Medical Services of 2nd Army, and James Johnston, the Senior Medical Officer. Despite their efforts, about another 9,000 died in April, and by the end of June 1945 another 4,000 had died. (After liberation 13,994 people died.):305
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.