In April 1940, Rudolph Höss, who become the first commandant, identified the Silesian town of Oswiecim as a possible site for a concentration camp. The function of the camp was initially to intimidate Poles and prevent resistance to German rule. It was also perceived as a cornerstone of the policy to re-colonize Upper Silesia, which had once been a German region, with 'pure Aryans'. On April 27th, Himmler ordered construction of the camp.

That same day, Gestapo official SS Sergeant Karl Silberbauer and two Dutch police collaborators arrested the Franks; the Gestapo sent them to Westerbork transit camp on August 8. One month later, on September 4, 1944, SS and police authorities placed the Franks and the four others hiding with them on a train transport to Auschwitz-Birkenau in German-occupied Poland.
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]
Addressing her diary entries to an imaginary friend she called Kitty, Anne Frank wrote about life in hiding, including her impressions of the other inhabitants of the Secret Annex, her feelings of loneliness and her frustration over the lack of privacy. While she detailed typical teenage issues such as crushes on boys, arguments with her mother and resentments toward her sister, Frank also displayed keen insight and maturity when she wrote about the war, humanity and her own identity. She also penned short stories and essays during her time in hiding.

National Socialist politics was based on competition and struggle as its organizing principle, and the Nazis believed that "human life consisted of eternal struggle and competition and derived its meaning from struggle and competition."[167] The Nazis saw this eternal struggle in military terms, and advocated a society organized like an army in order to achieve success. They promoted the idea of a national-racial "people's community" (Volksgemeinschaft) in order to accomplish "the efficient prosecution of the struggle against other peoples and states."[168] Like an army, the Volksgemeinschaft was meant to consist of a hierarchy of ranks or classes of people, some commanding and others obeying, all working together for a common goal.[168] This concept was rooted in the writings of 19th century völkisch authors who glorified medieval German society, viewing it as a "community rooted in the land and bound together by custom and tradition," in which there was neither class conflict nor selfish individualism.[169]
In the first months of Hitler's chancellorship, the Nazis instituted a policy of "coordination"—the alignment of individuals and institutions with Nazi goals. Culture, the economy, education, and law all came under Nazi control. The Nazi regime also attempted to "coordinate" the German churches and, although not entirely successful, won support from a majority of Catholic and Protestant clergymen.
According to the famous philosopher and political theorist, Hannah Arendt, the allure of Nazism as a totalitarian ideology (with its attendant mobilisation of the German population) resided within the construct of helping that society deal with the cognitive dissonance resultant from the tragic interruption of the First World War and the economic and material suffering consequent to the Depression and brought to order the revolutionary unrest occurring all around them. Instead of the plurality that existed in democratic or parliamentary states, Nazism as a totalitarian system promulgated "clear" solutions to the historical problems faced by Germany, levied support by de-legitimizing the former government of Weimar and provided a politico-biological pathway to a better future, one free from the uncertainty of the past. It was the atomised and disaffected masses that Hitler and the party elite pointed in a particular direction and using clever propaganda to make them into ideological adherents, exploited in bringing Nazism to life.[275]
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 Nazi Party was banned on 9 November 1923; however, with the support of the nationalist Völkisch-Social Bloc (Völkisch-Sozialer Block), it continued to operate under the name "German Party" (Deutsche Partei or DP) from 1924 to 1925.[66] The Nazis failed to remain unified in the DP, as in the north, the right-wing Volkish nationalist supporters of the Nazis moved to the new German Völkisch Freedom Party, leaving the north's left-wing Nazi members, such as Joseph Goebbels retaining support for the party.[67]
Hitler's peace overtures to the new British Prime Minister Winston Churchill were rejected in July 1940. Grand Admiral Erich Raeder had advised Hitler in June that air superiority was a pre-condition for a successful invasion of Britain, so Hitler ordered a series of aerial attacks on Royal Air Force (RAF) airbases and radar stations, as well as nightly air raids on British cities, including London, Plymouth, and Coventry. The German Luftwaffe failed to defeat the RAF in what became known as the Battle of Britain, and by the end of October, Hitler realised that air superiority would not be achieved. He permanently postponed the invasion, a plan which the commanders of the German army had never taken entirely seriously.[107][108][e] Several historians, including Andrew Gordon, believe the primary reason for the failure of the invasion plan was due to the superiority of the Royal Navy, not the actions of the RAF.[109]
Towards the war's end, in an effort to remove all traces of the crimes they had committed, the SS began to dismantle and raze the gas chambers, crematoria, and other buildings, as well as burning documents. Prisoners capable of moving were forced into death marches to other remaining areas of the Third Reich. Those who remained behind in the camp were liberated by Red Army soldiers on 27 January 1945. An estimated 1.3 million Jews, Poles, Soviet POWs, Roma, homosexuals, and Jehovah's Witnesses had been murdered within the camps by the time of liberation.

Over the years, several films about Anne Frank appeared. Her life and writings have inspired a diverse group of artists and social commentators to make reference to her in literature, popular music, television, and other media. These include The Anne Frank Ballet by Adam Darius,[113] first performed in 1959, and the choral work Annelies, first performed in 2005.[114] The only known footage of the real Anne Frank comes from a 1941 silent film recorded for her newlywed next-door neighbour. She is seen leaning out of a second-floor window in an attempt to better view the bride and groom. The couple, who survived the war, gave the film to the Anne Frank House.[115]

Between 1940 and 1942, the French interned Jewish refugee families fleeing Nazi oppression elsewhere in Europe in Rivesaltes for the same reason. Lists of those incarcerated include a transport of Czech Jewish children: Brothers Salomon and Abraham Davidovic were 13 and 14 when they arrived. Conditions deteriorated. Directors complained in 1941 of no heat. Illness spread. Babies and the elderly died. The situation worsened when the Nazi-puppet Vichy regime assumed control of the camp in 1942 and began deporting its 7,000 foreign Jewish refugee prisoners to the gas chambers of Auschwitz. There, mothers and children were not separated but instead went to their deaths together.
At the end of 1944 and early in 1945, a complete deterioration of living conditions set in as thousands of survivors of death marches began to arrive at the camp. The large numbers arriving at the camp soon overwhelmed the meagre resources available. The camp administration did not attempt to house them. Serious overcrowding and a lack of sanitary facilities resulted in the break-out of a typhus epidemic. From January to mid-April 1945, some 35,000 prisoners died due to typhus, starvation and the terrible conditions within the camp.
I did go back to my home town, Radom, just once in 1996 or 1998. I saw our house, and stood in the backyard, but my heart was bleeding so much, I didn’t dare go in. I walked up the street and it was like walking on history – something lost and far away, but also very close. Here was the road on which I used to run to school, to the factory, but I had to get away very quickly. I was thinking: “I’m here, but where are all of them, my family?”
As the German economy developed, the country began to suffer labour shortages. The concentration camp population was used to fill this void. After the Anschluss, thousands of Austrian Jews recently forced out of employment, non-Jewish ‘asocials’ and opponents of the Nazis were rounded up and used as a freely available source of forced labour. Many of these would provide the much-needed human resources to produce weapons, vehicles and goods for the German war effort.
In February 1938, Hitler emphasised to Austrian Chancellor Kurt Schuschnigg the need for Germany to secure its frontiers. Schuschnigg scheduled a plebiscite regarding Austrian independence for 13 March, but Hitler sent an ultimatum to Schuschnigg on 11 March demanding that he hand over all power to the Austrian NSDAP or face an invasion. German troops entered Austria the next day, to be greeted with enthusiasm by the populace.[65]

Drexler's movement received attention and support from some influential figures. Supporter Dietrich Eckart, a well-to-do journalist, brought military figure Felix Graf von Bothmer, a prominent supporter of the concept of "national socialism", to address the movement.[27] Later in 1918, Karl Harrer (a journalist and member of the Thule Society) convinced Drexler and several others to form the Politischer Arbeiterzirkel (Political Workers' Circle).[23] The members met periodically for discussions with themes of nationalism and racism directed against the Jews.[23] In December 1918, Drexler decided that a new political party should be formed, based on the political principles that he endorsed, by combining his branch of the Workers' Committee for a good Peace with the Political Workers' Circle.[23][28]
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.