The Nazi regime dominated neighbours through military threats in the years leading up to war. Nazi Germany made increasingly aggressive territorial demands, threatening war if these were not met. It seized Austria and Czechoslovakia in 1938 and 1939. Hitler made a non-aggression pact with Joseph Stalin and invaded Poland in September 1939, launching World War II in Europe. By early 1941, Germany controlled much of Europe. Reichskommissariats took control of conquered areas and a German administration was established in the remainder of Poland. Germany exploited the raw materials and labour of both its occupied territories and its allies. In the Holocaust, millions of Jews and other peoples deemed undesirable by the state were imprisoned, murdered in Nazi concentration camps and extermination camps, or shot.
All of the extermination camps were thoroughly organised and resembled industrial plants to an alarming degree. However, only Auschwitz-Birkenau, with its advanced gassing facilities and crematoria, was marked by high technology. In crematoria I and II there were elevators from the gas chambers underground, where the Jews were murdered, to the crematoria, where the bodies were burned.
The Frank sisters were excelling in their studies and had many friends, but with the introduction of a decree that Jews could attend only Jewish schools, they were enrolled at the Jewish Lyceum. Anne became a friend of Jacqueline van Maarsen in the Lyceum.[13] In April 1941, Otto took action to prevent Pectacon from being confiscated as a Jewish-owned business. He transferred his shares in Pectacon to Johannes Kleiman and resigned as director. The company was liquidated and all assets transferred to Gies and Company, headed by Jan Gies. In December, Otto followed a similar process to save Opekta. The businesses continued with little obvious change and their survival allowed Otto to earn a minimal income, but sufficient to provide for his family.[16]
The Auschwitz registry (Hauptbücher) shows that 20,946 Roma were registered prisoners,[146] and another 3,000 are thought to have entered unregistered.[147] On 22 March 1943, one transport of 1,700 Polish Sinti and Roma was gassed on arrival because of illness, as was a second group of 1,035 on 25 May 1943.[146] The SS tried to liquidate the camp on 16 May 1944, but the Roma fought them, armed with knives and iron pipes, and the SS retreated. Shortly after this, the SS removed nearly 2,908 from the family camp to work, and on 2 August 1944 gassed the other 2,897. Ten thousand remain unaccounted for.[148]
From 1921 to 1922, Hitler evoked rhetoric of both the achievement of Lebensraum involving the acceptance of a territorially reduced Russia as well as supporting Russian nationals in overthrowing the Bolshevik government and establishing a new Russian government.[131] Hitler's attitudes changed by the end of 1922, in which he then supported an alliance of Germany with Britain to destroy Russia.[131] Hitler later declared how far he intended to expand Germany into Russia:
According to Hankes there has been a national shift among white supremacist and neo-Nazi groups. "It wasn't that long ago that we were having conversations about whether the movement was going to age out. You would go to conferences and it would be an audience full of white men in their late 30s and up. Now, you go to the same conferences and they're sold out and the average age has dropped by 20 years," Hankes explained.

Against the advice of many of his senior military officers, Hitler ordered an attack on France and the Low Countries, which began in May 1940.[97][98] They quickly conquered Luxembourg and the Netherlands. After outmanoeuvring the Allies in Belgium and forcing the evacuation of many British and French troops at Dunkirk,[99] France fell as well, surrendering to Germany on 22 June.[100] The victory in France resulted in an upswing in Hitler's popularity and an upsurge in war fever in Germany.[101]

The political programme espoused by Hitler and the NSDAP brought about a world war, leaving behind a devastated and impoverished Europe. Germany itself suffered wholesale destruction, characterised as Stunde Null (Zero Hour).[487] The number of civilians killed during the Second World War was unprecedented in the history of warfare.[488] As a result, Nazi ideology and the actions taken by the regime are almost universally regarded as gravely immoral.[489] Historians, philosophers, and politicians often use the word "evil" to describe Hitler and the Nazi regime.[490] Interest in Nazi Germany continues in the media and the academic world. While Evans remarks that the era "exerts an almost universal appeal because its murderous racism stands as a warning to the whole of humanity",[491] young neo-Nazis enjoy the shock value the use Nazi symbols or slogans provides.[492] The display or use of Nazi symbolism such as flags, swastikas, or greetings is illegal in Germany and Austria.[493][494]

Although there have been persistent claims of betrayal by an informant, the source of the information that led the authorities to raid the Achterhuis has never been identified. Night watchman Martin Sleegers and an unidentified police officer investigated a burglary at the premises in April 1944 and came across the bookcase concealing the secret door. Tonny Ahlers, a member of the National Socialist Movement in the Netherlands (NSB), was suspected of being the informant by Carol Ann Lee, biographer of Otto Frank. Another suspect is stockroom manager Willem van Maaren. The Annex occupants did not trust him, as he seemed inquisitive regarding people entering the stockroom after hours. He once unexpectedly asked the employees whether there had previously been a Mr. Frank at the office. Lena Hartog was suspected of being the informant by Anne Frank's biographer Melissa Müller. Several of these suspects knew one another and might have worked in collaboration. While virtually everyone connected with the betrayal was interrogated after the war, no one was definitively identified as being the informant.[41]
The most pressing economic matter the Nazis initially faced was the 30 percent national unemployment rate.[251] Economist Dr. Hjalmar Schacht, President of the Reichsbank and Minister of Economics, created a scheme for deficit financing in May 1933. Capital projects were paid for with the issuance of promissory notes called Mefo bills. When the notes were presented for payment, the Reichsbank printed money. Hitler and his economic team expected that the upcoming territorial expansion would provide the means of repaying the soaring national debt.[252] Schacht's administration achieved a rapid decline in the unemployment rate, the largest of any country during the Great Depression.[251] Economic recovery was uneven, with reduced hours of work and erratic availability of necessities, leading to disenchantment with the regime as early as 1934.[253]
Höss was succeeded as Auschwitz commandant in November 1943 by SS Obersturmbannführer Arthur Liebehenschel, who served until 15 May 1944. SS Sturmbannführer Richard Baer became commandant of Auschwitz I on 11 May 1944, and SS Obersturmbannführer Fritz Hartjenstein of Auschwitz II from 22 November 1943, followed by SS Obersturmbannführer Josef Kramer from 15 May 1944 until the camp's liquidation in January 1945. Heinrich Schwarz was commandant of Auschwitz III from the point at which it became an autonomous camp in November 1943 until its liquidation.[83]
In 2018 the Polish government passed an amendment to its Act on the Institute of National Remembrance, making it a criminal offence to make false suggestions of Polish complicity in the Holocaust, which would include referring to Auschwitz and other camps as "Polish death camps".[304] After discussions with Israel's prime minister, amid international concern that the law would stifle research, the Polish government adjusted the amendment so that anyone falsely accusing Poland of complicity would be guilty only of a civil offence.[305]
I have been asked repeatedly where all the men were procured who torment the inmates of the camps, often with sadistic lust. We must not forget that a career in the S.S. allures, as a steppingstone, many a youth who cannot quite make the military career, whether for financial reasons or for lack of educational background. There are certainly a great number among them who personify brutality and are glad to be allowed to use their instincts without check against defenseless people. But there are also others who, for the sake of a career, run with the pack, and whose cruelties have been developed by the example of the 'talented' sadists.
Auschwitz was probably chosen to play a central role in the “final solution” because it was located at a railway junction with 44 parallel tracks—rail lines that were used to transport Jews from throughout Europe to their death. Heinrich Himmler, chief of the SS, the Nazi paramilitary corps, ordered the establishment of the first camp, the prison camp, on April 27, 1940, and the first transport of Polish political prisoners arrived on June 14. This small camp, Auschwitz I, was reserved throughout its history for political prisoners, mainly Poles and Germans.

Of the seven people who hid in the secret annex, only Otto Frank survived. Upon returning to Amsterdam on June 3, he discovered that his employees had faithfully kept his business running, awaiting his return. He stayed with Miep Gies and her husband and immediately began searching for his daughters—in mid-July, he learned of their deaths at Bergen-Belsen.

^ "Social democracy is objectively the moderate wing of fascism. … These organisations (ie Fascism and social democracy) are not antipodes, they are twins." (J.V. Stalin: Concerning the International Situation (September 1924), in Works, Volume 6, 1953; p. 294.) This later led Otto Wille Kuusinen to conclude that "The aims of the fascists and the social-fascists are the same." (Report To the 10th Plenum of ECCI, in International Press Correspondence, Volume 9, no.40, (20 August 1929), p. 848.)

^ In The Drowned and the Saved (1986), Levi wrote that the concentration camps represented the epitome of the totalitarian system: "[N]ever has there existed a state that was really "totalitarian" ... Never has some form of reaction, a corrective of the total tyranny, been lacking, not even in the Third Reich or Stalin's Soviet Union: in both cases, public opinion, the magistrature, the foreign press, the churches, the feeling for justice and humanity that ten or twenty years of tyranny were not enough to eradicate, have to a greater or lesser extent acted as a brake. Only in the Lager [camp] was the restraint from below nonexistent, and the power of these small satraps absolute."[277]

The general membership of the Nazi Party mainly consisted of the urban and rural lower middle classes. 7% belonged to the upper class, another 7% were peasants, 35% were industrial workers and 51% were what can be described as middle class. In early 1933, just before Hitler's appointment to the chancellorship, the party showed an under-representation of "workers", who made up 29.7% of the membership but 46.3% of German society. Conversely, white-collar employees (18.6% of members and 12% of Germans), the self-employed (19.8% of members and 9.6% of Germans) and civil servants (15.2% of members and 4.8% of the German population) had joined in proportions greater than their share of the general population.[115] These members were affiliated with local branches of the party, of which there were 1,378 throughout the country in 1928. In 1932, the number had risen to 11,845, reflecting the party's growth in this period.[115]
The death camp and slave-labour camp were interrelated. Newly arrived prisoners at the death camp were divided in a process known as Selektion. The young and the able-bodied were sent to work. Young children and their mothers and the old and infirm were sent directly to the gas chambers. Thousands of prisoners were also selected by the camp doctor, Josef Mengele, for medical experiments. Auschwitz doctors tested methods of sterilization on the prisoners, using massive doses of radiation, uterine injections, and other barbaric procedures. Experiments involving the killing of twins, upon whom autopsies were performed, were meant to provide information that would supposedly lead to the rapid expansion of the “Aryan race.”
Up to this point, though, Auschwitz-Birkenau accounted for “only” 11 percent of the victims of the “Final Solution.” In August 1942, however, construction began on four large-scale gassing facilities. It appears from the plans that the first two gas chambers were adapted from mortuaries which, with the huge crematoria attached to them, were initially intended to cope with mortalities amongst the slave labor force in the camp, now approaching 100,000 and subject to a horrifying death rate. But from the autumn of 1942, it seems clear that the SS planners and civilian contractors were intending to build a mass-murder plant.

They did not greet us, nor did they smile; they seemed oppressed not only by compassion but by a confused restraint, which sealed their lips and bound their eyes to the funereal scene. It was that shame we knew so well, the shame that drowned us after the selections, and every time we had to watch, or submit to, some outrage: the shame the Germans did not know, that the just man experiences at another man's crime; the feeling of guilt that such a crime should exist, that it should have been introduced irrevocably into the world of things that exist, and that his will for good should have proved too weak or null, and should not have availed in defence.[252]
Drancy held 5,000 prisoners. Around 70,000 mainly Jewish prisoners passed through the camp between August 1941 and August 1944. On 22 June 1942, the Nazis began systematic deportations of Jews from Drancy to the extermination camps in occupied Poland. In the first transport 1,000 Jews were sent to Auschwitz-Birkenau. By the last transport on 31 July 1944, 64,759 Jews had been deported from Drancy in 64 transports. Approximately 61,000 of these Jews were sent to Auschwitz-Birkenau. A further 3,753 Jews had been transported to Sobibor.
But, in May 1944, a railroad spur line was built right into the camp to accelerate and simplify the handling of the tens of thousands of Hungarian and other Jews deported in the spring and summer of 1944. From then to November 1944, when all the other death camps had been abandoned, Birkenau surpassed all previous records for mass killing. The Hungarian deportations and the liquidation of the remaining Polish ghettos, such as Lodz, resulted in the gassing of 585,000 Jews. This period made Auschwitz-Birkenau into the most notorious killing site of all time.
“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?
Several SS personnel oversaw the killings at each gas chamber, while the bulk of the work was done by the mostly Jewish prisoners known as Sonderkommandos (special squads).[91][92] Hungarian doctor Miklós Nyiszli reported that the Sonderkommando numbered around 860 prisoners when the Hungarian Jews were being killed in May–July 1944.[93] Their responsibilities included removing goods and corpses from the incoming trains, guiding victims to the dressing rooms and gas chambers, and working in the "Canada" barracks, where the victims' possessions were stored.[94] Housed separately from other prisoners, in somewhat better conditions, their quality of life was further improved by access to the goods taken from murdered prisoners, which they were sometimes able to steal and trade on Auschwitz's black market.[95] Many Sonderkommandos committed suicide in response to the horrors of their work; others were generally shot by the SS in a matter of weeks. New Sonderkommando units were formed from incoming transports. Almost none of the 2,000 prisoners placed in these units survived to the camp's liberation.[96]
Nine out of 10 victims in Auschwitz-Birkenau were Jews. The remaining victims were mainly Poles, gypsies, and Soviet POW’s. Majdanek began its gassings in October 1942. The camp functioned in the same way as Auschwitz-Birkenau, and also included a concentration- and work camp. In the autumn of 1943 the camp was closed after claiming between 60,000 and 80,000 Jewish victims.
As a result of the Holocaust, the term "concentration camp" carries many of the connotations of "extermination camp" and is sometimes used synonymously. Because of these ominous connotations, the term "concentration camp", originally itself a euphemism, has been replaced by newer terms such as internment camp, resettlement camp, detention facility, etc., regardless of the actual circumstances of the camp, which can vary a great deal.