With the deportations from Hungary, the role of Auschwitz-Birkenau in the German plan to murder the Jews of Europe achieved its highest effectiveness. Between late April and early July 1944, approximately 440,000 Jews were deported from Hungary. Of the nearly 426,000 Hungarian Jews deported to Auschwitz, approximately 320,000 of them were sent directly to the gas chambers in Auschwitz-Birkenau. They deployed approximately 110,000 at forced labor in the Auschwitz camp complex. The SS authorities transferred many of these Hungarian Jewish forced laborers within weeks of their arrival in Auschwitz to other concentration camps in Germany and Austria.

After three days at Auschwitz, I was left with the feeling that for some visitors, the former concentration camp is a box to check off on a tourist “to-do” list. But many people appeared genuinely moved. I saw Israeli teenagers crying and hugging each other and groups of people transfixed by the mug shots of prisoners that line the walls of one of the Auschwitz barracks. Walking through the room full of hair still makes my stomach churn. But what I hadn’t remembered from my first visit was the room next door filled with battered cooking pots and pans, brought by people who believed until the last moment that there was a future wherever they were being taken. And when Banas told me about the carefully folded math test that conservationists found hidden in a child’s shoe, I choked up. Even if only a fraction of the people who come here each year are profoundly affected, a fraction of a million is still a lot of people.
Sessions’s characterization falls into a nether region between truth and falsehood. Perhaps his is the best comment to begin with precisely because it is a half-truth. Yes, after 1941, concentration camps held Jews to prevent them from leaving Germany — but also to consolidate them for extermination. However, for more than eight years earlier, the camps generally were used for the opposite purpose: to force Jews to emigrate from Germany by making life intolerable, in part by separating men from their families. This is precisely the kind of important historical nuance lost in the hysteria surrounding Trump’s callous immigration policy. There are valuable comparisons to be made, but they must be historically informed.
After the Night of the Long Knives, Hitler promoted Himmler and the SS, who then zealously suppressed homosexuality by saying: "We must exterminate these people root and branch ... the homosexual must be eliminated".[201] In 1936, Himmler established the "Reichszentrale zur Bekämpfung der Homosexualität und Abtreibung" ("Reich Central Office for the Combating of Homosexuality and Abortion").[202] The Nazi regime incarcerated some 100,000 homosexuals during the 1930s.[203] As concentration camp prisoners, homosexual men were forced to wear pink triangle badges.[204][205] Nazi ideology still viewed German men who were gay as a part of the Aryan master race, but the Nazi regime attempted to force them into sexual and social conformity. Homosexuals were viewed as failing in their duty to procreate and reproduce for the Aryan nation. Gay men who would not change or feign a change in their sexual orientation were sent to concentration camps under the "Extermination Through Work" campaign.[206]
In Autumn 1943, the camp administration was reorganized following a corruption scandal. By the end of 1943, the prisoner population of Auschwitz main camp, Birkenau, Monowitz and other subcamps was over 80,000: 18,437 in the main camp, 49,114 in Birkenau, and 13,288 at Monowitz where I G Farben had its synthetic rubber plant. Up to 50,000 prisoners were scattered around 51 subcamps such as Rajsko, an experimental agricultural station, and Gleiwitz, a coal mine (see The List of the Camps for a complete list of those subcamps).
The first camp in Germany, Dachau, was founded in March 1933.[13] The press announcement said that "the first concentration camp is to be opened in Dachau with an accommodation for 5,000 people. All Communists and – where necessary – Reichsbanner and Social Democratic functionaries who endanger state security are to be concentrated there, as in the long run it is not possible to keep individual functionaries in the state prisons without overburdening these prisons."[13] Dachau was the first regular concentration camp established by the German coalition government of National Socialist Workers' Party (Nazi Party) and the Nationalist People's Party (dissolved on 6 July 1933). Heinrich Himmler, then Chief of Police of Munich, officially described the camp as "the first concentration camp for political prisoners."[13]