On 12 March 1938 the ‘Anschluss’ (‘Annexation’) of austrofascist Austria to the German Reich took place. Two weeks later, the National Socialist Gauleiter (regional head) of Upper Austria, August Eigruber, announced to an enthusiastic audience that his Gau would have the ‘distinction’ of building a concentration camp. The location chosen was the town of Mauthausen on the Danube. Political opponents and groups of people labelled as ‘criminal’ or ‘antisocial’ would be imprisoned here and forced to work in the granite quarries.

The first experimental gassing took place in September 1941, when Lagerführer Karl Fritzsch, at the instruction of Rudolf Höss, killed a group of Soviet prisoners of war by throwing Zyklon B crystals into their basement cell in block 11 of Auschwitz I. A second group of 600 Soviet prisoners of war and around 250 sick Polish prisoners was gassed on 3–5 September.[29] The morgue was later converted to a gas chamber able to hold at least 700–800 people.[30] Zyklon B was dropped into the room through slits in the ceiling.[28] In the view of Filip Müller, one of the Sonderkommando who worked in crematorium I, tens of thousands of Jews were killed there from France, Holland, Slovakia, Upper Silesia, Yugoslavia, and from the Theresienstadt, Ciechanow, and Grodno ghettos.[31] The last inmates to be gassed in Auschwitz I, in December 1942, were 300–400 members of the Auschwitz II Sonderkommando, who had been forced to dig up that camp's mass graves, thought to hold 100,000 corpses, and burn the remains.[32]
Otto Frank gave the diary to the historian Annie Romein-Verschoor, who tried unsuccessfully to have it published. She then gave it to her husband Jan Romein, who wrote an article about it, titled "Kinderstem" ("A Child's Voice"), which was published in the newspaper Het Parool on 3 April 1946. He wrote that the diary "stammered out in a child's voice, embodies all the hideousness of fascism, more so than all the evidence at Nuremberg put together."[69] His article attracted attention from publishers, and the diary was published in the Netherlands as Het Achterhuis (The Annex) in 1947,[70] followed by five more printings by 1950.[71]
The six extermination camps were established within a very short time. From December 1941 to December 1942 Chelmno, Belzec, Treblinka, Sobibor, Auschwitz-Birkenau and Majdanek all became operational. These sites were chosen because they were all situated near railway lines, in quiet rural areas of “far away” Poland, outside the spotlight of German and international public opinions.

At the Birkenau camp, a five-minute shuttle-bus ride from the Auschwitz visitor center, the scene was so peaceful it was almost impossible to imagine the sea of stinking mud that survivors describe. The vast expanse was covered in neatly mowed grass. Flocks of Israeli teenagers in matching white-and-blue hoodies wandered from ruin to ruin. As I stood at the stairs leading down into the ruined gas chambers, a dozen Brits posed for a group picture on the steps of a memorial just a few yards away.

On the night of the 27 February 1933 and 28 February 1933, someone set the Reichstag building on fire. This was the building where the German Parliament held their meetings. The Nazis blamed the communists. Opponents of the Nazis said that the Nazis themselves had done it to come to power. On the very same day, an emergency law called Reichstagsbrandverordnung was passed. The government claimed it was to protect the state from people trying to hurt the country. With this law, most of the civil rights of the Weimar Republic did not count any longer. The Nazis used this against the other political parties. Members of the communist and social-democratic parties were put into prison or killed.

Under Nazi rule, all other political parties were banned. In 1933, the Nazis opened their first concentration camp, in Dachau, Germany, to house political prisoners. Dachau evolved into a death camp where countless thousands of Jews died from malnutrition, disease and overwork or were executed. In addition to Jews, the camp’s prisoners included members of other groups Hitler considered unfit for the new Germany, including artists, intellectuals, Gypsies, the physically and mentally handicapped and homosexuals.
After their arrest, the Franks, Van Pels and Fritz Pfeffer were sent by the Gestapo to Westerbork, a holding camp in the northern Netherlands. From there, in September 1944, the group was transported by freight train to the Auschwitz-Birkenau extermination and concentration camp complex in German-occupied Poland. Anne and Margot Frank were spared immediate death in the Auschwitz gas chambers and instead were sent to Bergen-Belsen, a concentration camp in northern Germany. In March 1945, the Frank sisters died of typhus at Bergen-Belsen; their bodies were thrown into a mass grave. Several weeks later, on April 15, 1945, British forces liberated the camp.
While the Nazis maintained the nominal existence of state and regional governments in Germany itself, this policy was not extended to territories acquired after 1937. Even in German-speaking areas such as Austria, state and regional governments were formally disbanded as opposed to just being dis-empowered. After the Anschluss a new type of administrative unit was introduced called a Reichsgau. In these territories the Gauleiters also held the position of Reichsstatthalter, thereby formally combining the spheres of both party and state offices. The establishment of this type of district was subsequently carried out for any further territorial annexations of Germany both before and during World War II. Even the former territories of Prussia were never formally re-integrated into what was then Germany's largest state after being re-taken in the 1939 Polish campaign.

It is badly lighted, full of draughts, with the brick floor covered by a layer of mud. The water is not drinkable; it has a revolting smell and often fails for many hours. The walls are covered by curious didactic frescoes: for example, there is the good Häftling [prisoner], portrayed stripped to the waist, about to diligently soap his sheared and rosy cranium, and the bad Häftling, with a strong Semitic nose and a greenish colour, bundled up in his ostentatiously stained clothes with a beret on his head, who cautiously dips a finger into the water of the washbasin. Under the first is written: "So bist du rein" (like this you are clean), and under the second, "So gehst du ein" (like this you come to a bad end); and lower down, in doubtful French but in Gothic script: "La propreté, c'est la santé" [cleanliness is health].[108]

But Auschwitz—with its 155 buildings and hundreds of thousands of artifacts—is deteriorating. It is a conservation challenge like no other. “Our main problem is sheer numbers,” Jolanta Banas, the head of preservation, tells me as we walk through the white-tiled facility where she and her 48-member staff work. “We measure shoes in the ten thousands.”
Stos said he survived by making himself useful. Prisoners had a better chance of staying alive if they worked under a roof—in a kitchen or an administration building—or had a skill, such as training in medicine or engineering, that made them hard to replace. “The hunger was hellish, and if you could work you could get something to eat,” Stos said. Having grown up in the countryside, he could do a little bit of everything, from pouring concrete to cutting grass. I pressed him for details of his time in the camp, but he spoke only of the work. “I had eight different professions at Auschwitz,” he said. “I knew how to take care of myself. I avoided the worst of it.”
The camp Stos first saw, some 20 brick buildings, was a run-down former Polish artillery barrack the Nazis had taken over a few months before. Many Poles followed Stos to Auschwitz; few were as lucky. In its original incarnation as a concentration camp, Auschwitz was designed to work inmates to death. At first, most of the labor helped expand the camp itself; other work, such as gravel mining and farming, earned money for the SS. The Nazis even had a term for it, Vernichtung durch Arbeit (“Destruction through work”). The notorious SS camp supervisor Karl Fritzsch greeted new arrivals with a speech: “You have arrived here not at a sanatorium, but at a German concentration camp, from which the only exit is through the chimney of its crematorium.”
Heinrich Himmler's Schutzstaffel (SS) took full control of the police and the concentration camps throughout Germany in 1934–35.[5] Himmler expanded the role of the camps to hold so-called "racially undesirable elements", such as Jews, Gypsies/Romanis/Sintis, Serbs, Poles, disabled people, and criminals.[6][7][8] The number of people in the camps, which had fallen to 7,500, grew again to 21,000 by the start of World War II[9] and peaked at 715,000 in January 1945.[10]