The food was probably sufficient as far as quantity goes, although our younger companions, who had to work very hard, could not satisfy their appetites. Besides the so-called Komissbrot (a dark bread baked for use in the army), which was difficult to digest for the city dweller not accustomed to hard physical labor, we usually had thick soups of leguminous plants or potatoes, with lumps of whale meat which, as far as I could find out, came in cans and tasted something like pork. However, it had nothing of the oily taste that might have been expected. Occasionally we had sweet milk soups with tapioca for breakfast, and for noon evening meal we had sandwiches with usage, cheese, margarine, and jam. It is an open question whether the decided loss in weight of many prisoners was due to the unusual food or to the mental depression. Food so poor in vitamins, however, must cause harm if taken for a long space of time.

During the Holocaust, concentration camp prisoners received tattoos only at one location, Auschwitz. Incoming prisoners were assigned a camp serial number which was sewn to their prison uniforms. Only those prisoners selected for work were issued serial numbers; those prisoners sent directly to the gas chambers were not registered and received no tattoos.
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.
The two largest groups of prisoners in the camps, both numbering in the millions, were the Polish Jews and the Soviet prisoners of war (POWs) held without trial or judicial process. There were also large numbers of Romani people, ethnic Poles, Serbs, political prisoners, homosexuals, people with disabilities, Jehovah's Witnesses, Catholic clergy, Eastern European intellectuals and others (including common criminals, as the Nazis declared). In addition, a small number of Western Allied aviators were sent to concentration camps as punishment for spying.[28] Western Allied POWs who were Jews, or who were suspected of being Jews by the Nazis, were usually sent to ordinary POW camps; however, a small number of them were sent to concentration camps because of antisemitic policies.[29]
Mindful that no mere visit can convey what the concentration camp was like when the Nazis ran it, I met with survivors. The week before I arrived in Krakow, I had called Jozef Stos, 89, to ask if he would discuss his years in captivity. “If I’m still alive then, sure—it’s my civic responsibility,” he said with a laugh. “But I’m pretty darn old, you know.”
On 20 July 1932, the Prussian government was ousted by a coup, the Preussenschlag; a few days later at the July 1932 Reichstag election the Nazis made another leap forward, polling 37.4% and becoming the largest party in parliament by a wide margin. Furthermore, the Nazis and the Communists between them won 52% of the vote and a majority of seats. Since both parties opposed the established political system and neither would join or support any ministry, this made the formation of a majority government impossible. The result was weak ministries governing by decree. Under Comintern directives, the Communists maintained their policy of treating the Social Democrats as the main enemy, calling them "social fascists", thereby splintering opposition to the Nazis.[74] Later, both the Social Democrats and the Communists accused each other of having facilitated Hitler's rise to power by their unwillingness to compromise.

Hitler spoke of Nazism being indebted to the success of Fascism's rise to power in Italy.[125] In a private conversation in 1941, Hitler said that "the brown shirt would probably not have existed without the black shirt", the "brown shirt" referring to the Nazi militia and the "black shirt" referring to the Fascist militia.[125] He also said in regards to the 1920s: "If Mussolini had been outdistanced by Marxism, I don't know whether we could have succeeded in holding out. At that period National Socialism was a very fragile growth".[125]

The Nazis took things further, one step at the time. Jews had to start wearing a Star of David on their clothes and there were rumours that all Jews would have to leave the Netherlands. When Margot received a call-up to report for a so-called ‘labour camp’ in Nazi Germany on 5 July 1942, her parents were suspicious. They did not believe the call-up was about work and decided to go into hiding the next day in order to escape persecution.  

The history of Auschwitz-Birkenau as an extermination center is complex. From late 1941 to October 1942, the mortuary at Auschwitz main camp, which was already equipped with a crematorium, was adapted as a gas chamber. It measured approximately 835 square feet. In the spring of 1942, two provisional gas chambers at Birkenau were constructed out of peasant huts, known as the 'bunkers'.
“There is, of course, all possible types of administration done by the Germans of the time,” Thijs Baynes, the filmmaker behind the project, told the Guardian. “And there is an even bigger circle of circumstantial evidence. What [Dutch Nazi party] members were in the neighborhood? What connections were with the Gestapo? Where were Gestapo agents living?
According to the numbers provided by the US Holocaust Memorial Museum, Auschwitz was the site of the most deaths (1.1 million) of any of the six dedicated extermination camps. By these estimates, Auschwitz was the site of at least one out of every six deaths during the Holocaust. The only camp with comparable figures was Treblinka in north-east Poland, where about 850,000 are thought to have died.
The Diary, which has been translated into more than 65 languages, is the most widely read diary of the Holocaust, and Anne is probably the best known of Holocaust victims. The Diary was also made into a play that premiered on Broadway in October 1955, and in 1956 it won both the Tony Award for best play and the Pulitzer Prize for best drama. A film version directed by George Stevens was produced in 1959. The play was controversial: it was challenged by screenwriter Meyer Levin, who wrote an early version of the play (later realized as a 35-minute radio play) and accused Otto Frank and his chosen screenwriters, Frances Goodrich and Albert Hackett, of sanitizing and de-Judaizing the story. The play was often performed in high schools throughout the world and was revived (with additions) on Broadway in 1997–98.
From 1942, the SS reorganised the concentration camp administration to mobilise the millions of prisoners within the camps. The Nazis established hundreds of sub-camps across Europe. The Auschwitz camp complex contained over 40 sub-camps that housed thousands of Jewish prisoners to work as forced labour in the coalmines, various munitions factories and the I.G. Farben synthetic rubber plant at Buna Monovitz.
By 1940, the CCI came under the control of the Verwaltung und Wirtschaftshauptamt Hauptamt (VuWHA; Administration and Business office) which was set up under Oswald Pohl.[25] Then in 1942, the CCI became Amt D (Office D) of the consolidated main office known as the SS-Wirtschafts-Verwaltungshauptamt (SS Economic and Administrative Department; WVHA) under Pohl.[25] In 1942, the SS built a network of extermination camps to systematically kill millions of prisoners by gassing. The extermination camps (Vernichtungslager) and death camps (Todeslager) were camps whose primary function was genocide. The Nazis themselves distinguished the concentration camps from the extermination camps.[26][27] The British intelligence service had information about the concentration camps, and in 1942 Jan Karski delivered a thorough eyewitness account to the government.