Though we tend to think of Hitler’s Germany as a highly regimented dictatorship, in practice Nazi rule was chaotic and improvisatory. Rival power bases in the Party and the German state competed to carry out what they believed to be Hitler’s wishes. This system of “working towards the Fuhrer,” as it was called by Hitler’s biographer Ian Kershaw, was clearly in evidence when it came to the concentration camps. The K.L. system, during its twelve years of existence, included twenty-seven main camps and more than a thousand subcamps. At its peak, in early 1945, it housed more than seven hundred thousand inmates. In addition to being a major penal and economic institution, it was a central symbol of Hitler’s rule. Yet Hitler plays almost no role in Wachsmann’s book, and Wachsmann writes that Hitler was never seen to visit a camp. It was Heinrich Himmler, the head of the S.S., who was in charge of the camp system, and its growth was due in part to his ambition to make the S.S. the most powerful force in Germany.
The concentration camps make sense only if they are understood as products not of reason but of ideology, which is to say, of fantasy. Nazism taught the Germans to see themselves as a beleaguered nation, constantly set upon by enemies external and internal. Metaphors of infection and disease, of betrayal and stabs in the back, were central to Nazi discourse. The concentration camp became the place where those metaphorical evils could be rendered concrete and visible. Here, behind barbed wire, were the traitors, Bolsheviks, parasites, and Jews who were intent on destroying the Fatherland.
The women selected from this transport, including Anne, Edith, and Margot, were marked with numbers between A-25060 and A-25271. Records indicating their exact numbers have not been preserved. Approximately eight weeks later, in late October 1944, Anne and Margot were transferred from Auschwitz-Birkenau to Bergen-Belsen, where they both died sometime in March 1945. Though Anne’s death certificate documents her movement between camps, it, too, does not include her tattoo ID number.

In March 1941, Himmler ordered a second, larger complex to be built next to the original camp. It was called Auschwitz II - Birkenau. The camp at Birkenau was divided into subsections surrounded by electric fences with barbed wire. During 1943 and 1944 the BIIb section became the location of the „Terezín family camp“. At its summit, Birkenau had over 100 000 inmates. In March 1942, the Auschwitz III camp was set up at nearby Monowitz, also known as Buna Monowitz. German company I.G. Farben set up a synthetic rubber factory there, in which it used the prisoners' slave labour. Auschwitz also had a further 45 auxiliary camps, where prisoners were forced to engage in slave labour, mostly for German companies.
Early camps, usually without proper infrastructure, sprang up everywhere in Germany after Hitler became Chancellor in January 1933: rising "like mushrooms after the rain", Himmler recollected.[51] These early camps, also called "Wild camps" because some were set up with little supervision from higher authorities, were overseen by Nazi paramilitaries, by political-police forces, and sometimes by local police authorities. They utilized any lockable larger space, for example: engine rooms, brewery floors, storage facilities, cellars, etc.[52]
Until 1990, the museum’s directors were all former prisoners. Cywinski is just 37. His office is on the first floor of a former SS administration building directly across from a former gas chamber and crematorium. He tells me that Auschwitz is about to slip into history. The last survivors will soon die, and with them the living links to what happened here. Preserving the site becomes increasingly important, Cywinski believes: younger generations raised on TV and movie special effects need to see and touch the real thing.
Poles were viewed by Nazis as subhuman non-Aryans, and during the German occupation of Poland 2.7 million ethnic Poles were killed.[342] Polish civilians were subject to forced labour in German industry, internment, wholesale expulsions to make way for German colonists, and mass executions. The German authorities engaged in a systematic effort to destroy Polish culture and national identity. During operation AB-Aktion, many university professors and members of the Polish intelligentsia were arrested, transported to concentration camps, or executed. During the war, Poland lost an estimated 39 to 45 percent of its physicians and dentists, 26 to 57 percent of its lawyers, 15 to 30 percent of its teachers, 30 to 40 percent of its scientists and university professors, and 18 to 28 percent of its clergy.[343]

Medical experiments, many of them pseudoscientific, were performed on concentration camp inmates beginning in 1941.[395] The most notorious doctor to perform medical experiments was SS-Hauptsturmführer Dr. Josef Mengele, camp doctor at Auschwitz.[396] Many of his victims died or were intentionally killed.[397] Concentration camp inmates were made available for purchase by pharmaceutical companies for drug testing and other experiments.[398]
The Hitler cabinet used the terms of the Reichstag Fire Decree and later the Enabling Act to initiate the process of Gleichschaltung ("co-ordination"), which brought all aspects of life under party control.[25] Individual states not controlled by elected Nazi governments or Nazi-led coalitions were forced to agree to the appointment of Reich Commissars to bring the states in line with the policies of the central government. These Commissars had the power to appoint and remove local governments, state parliaments, officials, and judges. In this way Germany became a de facto unitary state, with all state governments controlled by the central government under the NSDAP.[26][27] The state parliaments and the Reichsrat (federal upper house) were abolished in January 1934,[28] with all state powers being transferred to the central government.[27]
After September 1939, with the beginning of the Second World War, concentration camps became places where millions of ordinary people were enslaved as part of the war effort, often starved, tortured and killed.[21] During the war, new Nazi concentration camps for "undesirables" spread throughout the continent. According to statistics by the German Ministry of Justice, about 1,200 camps and subcamps were run in countries occupied by Nazi Germany,[22] while the Jewish Virtual Library estimates that the number of Nazi camps was closer to 15,000 in all of occupied Europe[23][24] and that many of these camps were run for a limited amount of time before they were closed.[23] Camps were being created near the centers of dense populations, often focusing on areas with large communities of Jews, Polish intelligentsia, Communists or Romani. Since millions of Jews lived in pre-war Poland, most camps were located in the area of the General Government in occupied Poland, for logistical reasons. The location also allowed the Nazis to quickly remove the German Jews from within Germany proper.