Von Verschuer’s work revolved around hereditary influences on congenital defects such as cleft palate. Mengele was an enthusiastic assistant to von Verschuer, and he left the lab in 1938 with both a glowing recommendation and a second doctorate in medicine. For his dissertation topic, Mengele wrote about racial influences on the formation of the lower jaw.
In early 1942 the Nazis built killing centres at Treblinka, Sobibor, and Belzec in occupied Poland. The death camps were to be the essential instrument of the “final solution.” The Einsatzgruppen had traveled to kill their victims. With the killing centres, the process was reversed. The victims were taken by train, often in cattle cars, to their killers. The extermination camps became factories producing corpses, effectively and efficiently, at minimal physical and psychological cost to German personnel. Assisted by Ukrainian and Latvian collaborators and prisoners of war, a few Germans could kill tens of thousands of prisoners each month. At Chelmno, the first of the extermination camps, the Nazis used mobile gas vans. Elsewhere they built permanent gas chambers linked to the crematoria where bodies were burned. Carbon monoxide was the gas of choice at most camps. Zyklon-B, an especially lethal killing agent, was employed primarily at Auschwitz and later at Majdanek.
Miep Gies, one of the Dutch citizens who hid the Franks during the Holocaust, kept Anne Frank’s writings, including her diary. She handed the papers to Otto Frank on the day he learned of his daughters’ deaths. He organized the papers and worked doggedly to get the diary published, first in Dutch in 1947. The first American edition appeared in 1952.
German forces had begun evacuating many of the death camps in the fall of 1944, sending inmates under guard to march further from the advancing enemy’s front line. These so-called “death marches” continued all the way up to the German surrender, resulting in the deaths of some 250,000 to 375,000 people. In his classic book “Survival in Auschwitz,” the Italian Jewish author Primo Levi described his own state of mind, as well as that of his fellow inmates in Auschwitz on the day before Soviet troops arrived at the camp in January 1945: “We lay in a world of death and phantoms. The last trace of civilization had vanished around and inside us. The work of bestial degradation, begun by the victorious Germans, had been carried to conclusion by the Germans in defeat.”
The Chelmno killing center begins operation. The Nazis later establish five other such camps: Belzec, Sobibor, Treblinka, Auschwitz-Birkenau (part of the Auschwitz complex), and Majdanek. Victims at Chelmno are killed in gas vans (hermetically sealed trucks with engine exhaust diverted to the interior compartments). The Belzec, Sobibor, and Treblinka camps use carbon monoxide gas generated by stationary engines attached to gas chambers. Auschwitz-Birkenau, the largest of the killing centers, has four large gas chambers using Zyklon B (crystalline hydrogen cyanide) as the killing agent. The gas chambers at Majdanek use both carbon monoxide and Zyklon B. Millions of Jews are killed in the gas chambers in the killing centers as part of the "Final Solution."

Because they refused to pledge allegiance to the Nazi party or serve in the military, Jehovah's Witnesses were sent to concentration camps, where they were identified by purple triangles and given the option of renouncing their faith and submitting to the state's authority.[447] The United States Holocaust Memorial Museum estimates that between 2,700 and 3,300 were sent to the camps, where 1,400 died;[411] in The Holocaust Encyclopedia (2001), Sybil Milton estimates that 10,000 were sent and 2,500 died.[412] According to German historian Detlef Garbe, "no other religious movement resisted the pressure to conform to National Socialism with comparable unanimity and steadfastness."[448]
At Auschwitz, Yanina survived the gas chamber when adult bodies fell on top of her, protecting her from inhaling a lethal amount of poison gas. Found moaning by Jewish slave laborers who were forced to remove the bodies from the gas chambers, Yanina was resuscitated, given a uniform and told to blend in. Prisoners under the age of 15 were routinely gassed at Auschwitz, but Yanina was able to escape detection after her remarkable rescue.
To prosecute the leaders of the Holocaust, the International Military Tribunal in Nuremberg was formed in 1946. The U.S., the UK, the Soviet Union and France each supplied two judges (a primary and an alternate) and a prosecution team for the trial. Twelve leading Nazi officials were sentenced to death for the crimes they had committed, while three received life sentences in prison, and four had prison terms for up to twenty years.
Shipments of Jews to the camps had priority over anything but the army's needs on the German railways, and continued even in the face of the increasingly dire military situation at the end of 1942.[355] Army leaders and economic managers complained about this diversion of resources and the killing of skilled Jewish workers,[356] but Nazi leaders rated ideological imperatives above economic considerations.[357]

And so, at the behest of their Führer, a handful of Nazi bureaucrats conspired to bring about the demise of millions. On January 20, 1942, they attended the Wannsee Conference in Berlin, organized by SS-Obergruppenführer Reinhard Heydrich, who told them, “In the course of the practical execution of the Final Solution, Europe will be combed through from west to east.”

^ Kwiet, Konrad (1998). "Rehearsing for Murder: The Beginning of the Final Solution in Lithuania in June 1941". Holocaust and Genocide Studies. 12 (1): 3–26. doi:10.1093/hgs/12.1.3. and Kwiet, Konrad (4 December 1995). The Onset of the Holocaust: The Massacres of Jews in Lithuania in June 1941. J. B. and Maurice Shapiro Senior Scholar-in-Residence at the United States Holocaust Memorial Museum (Annual lecture). Published under the same title, but expanded in Bonnell, Andrew, ed. (1996). Power, Conscience and Opposition: Essays in German History in Honour of John A Moses. New York: Peter Lang. pp. 107–21.
…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…
At the Wannsee Conference on January 20, 1942 in Wannsee, a Berlin suburb, the details of the “Final Solution” were worked out. The meeting was convened by Reinhard Heydrich, who was the head of the S.S. main office and S.S. Chief Heinrich Himmler’s top aide. The purpose of the meeting was to coordinate the Nazi bureaucracy required to carry out the “Final Solution,” which provided for:

The Holocaust was the systematic, bureaucratic, state-sponsored persecution and murder of six million Jews by the Nazi regime and its collaborators. Holocaust is a word of Greek origin meaning "sacrifice by fire." The Nazis, who came to power in Germany in January 1933, believed that Germans were "racially superior" and that the Jews, deemed "inferior," were an alien threat to the so-called German racial community.
In 1950, the Dutch translator Rosey E. Pool made a first translation of the Diary, which was never published.[26] At the end of 1950, another translator was found to produce an English-language version. Barbara Mooyaart-Doubleday was contracted by Vallentine Mitchell in England, and by the end of the following year, her translation was submitted, now including the deleted passages at Otto Frank's request. As well, Judith Jones, while working for the publisher Doubleday, read and recommended the Diary, pulling it out of the rejection pile.[27] Jones recalled that she came across Frank's work in a slush pile of material that had been rejected by other publishers; she was struck by a photograph of the girl on the cover of an advance copy of the French edition. "I read it all day", she noted. "When my boss returned, I told him, 'We have to publish this book.' He said, 'What? That book by that kid?'" She brought the diary to the attention of Doubleday's New York office. "I made the book quite important because I was so taken with it, and I felt it would have a real market in America. It's one of those seminal books that will never be forgotten", Jones said.[28] The book appeared in the United States and in the United Kingdom in 1952, becoming a best-seller. The introduction to the English publication was written by Eleanor Roosevelt.
Himmler ordered the closure of ghettos in Poland in mid-July 1942; most inhabitants were sent to extermination camps. Those Jews needed for war production would be confined in concentration camps.[220] The deportations from the Warsaw Ghetto began on 22 July; over the almost two months of the Aktion, until 12 September, the population was reduced from 350,000 to 65,000. Those deported were transported in freight trains to the Treblinka extermination camp.[221] Similar deportations happened in other ghettos, with many ghettos totally emptied.[222] The first ghetto uprisings occurred in mid-1942 in small community ghettos.[223] Although there were armed resistance attempts in both the larger and smaller ghettos in 1943, in every case they failed against the overwhelming German military force, and the remaining Jews were either killed or deported to the death camps.[224]

As the unsuspecting people were herded off the train and ordered into separate lines, SS officers shouted in German, "Zwillinge!" (Twins!). Parents were forced to make a quick decision. Unsure of their situation, already being separated from family members when forced to form lines, seeing barbed wire, smelling an unfamiliar stench -- was it good or bad to be a twin?
Haaretz.com, the online edition of Haaretz Newspaper in Israel, and analysis from Israel and the Middle East. Haaretz.com provides extensive and in-depth coverage of Israel, the Jewish World and the Middle East, including defense, diplomacy, the Arab-Israeli conflict, the peace process, Israeli politics, Jerusalem affairs, international relations, Iran, Iraq, Syria, Lebanon, the Palestinian Authority, the West Bank and the Gaza Strip, the Israeli business world and Jewish life in Israel and the Diaspora.
When did the Nazis decide to kill all the Jews of Europe? Was murder always in the mind of Adolf Hitler? These are some of the most difficult questions historians have to answer. Certainly, up until the invasion of the Soviet Union, Jews did manage to emigrate from Germany. Historians will never know precisely when the order for mass killing was given, but large-scale murders began with the invasion of Russia.

Folman and Polonsky’s greatest missed opportunity, however, is their representation of Anne. As readers have been aware since the Definitive Edition appeared more than 20 years ago, the “Diary” as we know it, despite its misleading title, isn’t a literal diary. In spring 1944, the inhabitants of the Annex heard a radio broadcast in which a Dutch cabinet minister called for citizens to preserve their diaries and letters as a record of the war years — a moment depicted in the graphic adaptation. Afterward, Anne began to revise what she had written for eventual publication as an autobiographical novel, working at the furious rate of up to a dozen pages a day. She rewrote and standardized early entries and also created new ones to fill in gaps in her story, such as the history of her family. What we have come to think of as Anne’s diary, as Francine Prose and others have written, would be more accurately described as a memoir in the form of diary entries. But myths die slow deaths, and most readers still aren’t aware of the complexities behind the book’s creation.
What could be more "useful" than to view that era through the mind and eyes -- and in the words -- of a girl who wanted us to know who she was and what happened to her. And what could be more necessary than the story of a girl who wanted to grow up, to become a writer, to lead a full and normal life -- and was prevented from doing so, by the forces of prejudice and hatred, on a beautiful and otherwise ordinary August morning.
Hilberg, Raul (1985). The Destruction of the European Jews: The Revised and Definitive Edition. New York: Holmes and Meier. ISBN 0-8419-0832-X – via Archive.org search inside. The deportations ... were the work of a much larger apparatus that had to deal with a host of constraints and requirements. The effort, as we shall see, was deemed necessary to accomplish the Final Solution on a European-wide scale.[p.273] 
The Roma refer to the genocide of the Romani people as the Pořajmos.[414] Because they are traditionally a private people with a culture based on oral history, less is known about their experience than that of any other group.[415] Bauer writes that this can be attributed to the Roma's distrust and suspicion, and to their humiliation because some of the taboos in Romani culture regarding hygiene and sex were violated at Auschwitz.[416] In May 1942, the Roma were placed under similar laws to the Jews. On 16 December 1942, Himmler issued a decree that "Gypsy Mischlinge [mixed breeds], Roma Gypsies, and members of the clans of Balkan origins who are not of German blood" should be sent to Auschwitz, unless they had served in the Wehrmacht.[417] He adjusted the order on 15 November 1943; in the occupied Soviet areas, "sedentary Gypsies and part-Gypsies are to be treated as citizens of the country. Nomadic Gypsies and part-Gypsies are to be placed on the same level as Jews and placed in concentration camps."[418] Bauer argues that this adjustment reflected Nazi ideology that the Roma, originally an Aryan population, had been "spoiled" by non-Romani blood.[419]

^ Bradley F. Smith & Agnes Peterson (1974), Heinrich Himmler. Speeches Frankfurt/M., p. 169 f. OCLC 1241890; "Himmler's Speech in Posen on 6 October 1944". Holocaust Controversies Reference Section. Archived from the original on 27 January 2016. Retrieved 28 February 2015.; also (with differing translation) in "Heinrich Himmler". United States Holocaust Memorial Museum. Archived from the original on 14 December 2013. Retrieved 28 February 2015.
In June 1941, Mengele was posted to Ukraine, where he was awarded the Iron Cross 2nd Class. In January 1942, he joined the 5th SS Panzer Division Wiking as a battalion medical officer. After rescuing two German soldiers from a burning tank, he was decorated with the Iron Cross 1st Class, the Wound Badge in Black, and the Medal for the Care of the German People. He was declared unfit for further active service in mid-1942, when he was seriously wounded in action near Rostov-on-Don. Following his recovery, he was transferred to the headquarters of the SS Race and Settlement Main Office in Berlin, at which point he resumed his association with von Verschuer, who was now director of the Kaiser Wilhelm Institute of Anthropology, Human Heredity, and Eugenics. Mengele was promoted to the rank of SS-Hauptsturmführer (captain) in April 1943.[20][21][22]