Auschwitz is the most famous because there the killing machine was the most efficient. There, between the end of 1941 and 1944, as many as 12,000 Jews a day could be gassed to death and cremated. In addition to the Jews, hundreds of thousands of others deemed threats to the Nazi regime or considered racially inferior or socially deviant were also murdered.

Mengele earned his first doctorate in anthropology from the University of Munich in 1935. He did his post-doctoral work at Frankfurt under Dr. Otmar Freiherr von Verschuer, who was a fully indoctrinated Nazi eugenicist. National Socialism always held that individuals were the product of their heredity, and von Verschuer was one of the Nazi-aligned scientists whose work seemed to legitimize that assertion.
An emaciated 18-year-old Russian girl looks into the camera lens during the liberation of Dachau concentration camp in 1945. Dachau was the first German concentration camp, opened in 1933. More than 200,000 people were detained between 1933 and 1945, and 31,591 deaths were declared, most from disease, malnutrition and suicide. Unlike Auschwitz, Dachau was not explicitly an extermination camp, but conditions were so horrific that hundreds died every week. #
The Protocol also highlighted the fact that in Slovakia, Croatia and Romania, local governments were working with the Nazis in their anti-Jewish activities. In Italy, the Nazis planned to liaise with the Italian police. France, the document said, would not prove difficult. It was noted that there was much opposition to the Nazis’ anti-Jewish policies in the Nordic States, and that the ‘Final Solution’ would be postponed for a while in these countries.

The unstoppable Allied military advance continued and on July 24, 1944, Soviet troops liberated the first camp, Majdanek in eastern Poland, where over 360,000 had died. As the Soviet Army neared Auschwitz, Himmler ordered the complete destruction of the gas chambers. Throughout Hitler's crumbling Reich, the SS now began conducting death marches of surviving concentration camp inmates away from outlying areas, including some 66,000 from Auschwitz. Most of the inmates on these marches either dropped dead from exertion or were shot by the SS when they failed to keep up with the column.

On April 16, 1945 Soviets surrounded Berlin, Germany’s capital. When the Soviets began advancing towards the Reich Chancellery, Hitler committed suicide on April 30, 1945. Then on May 7th, Germany surrendered to the Western Allies in Reims, France and a few days later to the Soviets in Berlin. All told more than 60 million people, or about 3% of the world’s population at the time, were killed during the course of the Second World War.
After several months on the run, including a trip back to the Soviet-occupied area to recover his Auschwitz records, Mengele found work near Rosenheim as a farmhand.[62] He eventually escaped from Germany on 17 April 1949,[63][64] convinced that his capture would mean a trial and death sentence. Assisted by a network of former SS members, he used the ratline to travel to Genoa, where he obtained a passport from the International Committee of the Red Cross under the alias "Helmut Gregor", and sailed to Argentina in July 1949.[65] His wife refused to accompany him, and they divorced in 1954.[66]
Olga Lengyel, a prisoner at the Birkenau camp, wrote in her book entitled "Five Chimneys" that she had heard about Dr. Mengele from the other inmates before she saw him. Lengyel wrote that she had heard that Dr. Mengele was "good-looking" but she was surprised by how "really handsome" he was. Lengyel wrote, regarding Dr. Mengele: "Though he was making decisions that meant extermination, he was as pleasantly smug as any man could be."

But throughout Nazi-occupied Europe, relatively few non-Jewish persons were willing to risk their own lives to help the Jews. Notable exceptions included Oskar Schindler, a German who saved 1200 Jews by moving them from Plaszow labor camp to his hometown of Brunnlitz. The country of Denmark rescued nearly its entire population of Jews, over 7000, by transporting them to safety by sea. Italy and Bulgaria both refused to cooperate with German demands for deportations. Elsewhere in Europe, people generally stood by passively and watched as Jewish families were marched through the streets toward waiting trains, or in some cases, actively participated in Nazi persecutions.

After the Wannsee Conference in January 1942, the Nazis began the systematic deportation of Jews from all over Europe to six extermination camps established in former Polish territory -- Chelmno , Belzec, Sobibor, Treblinka, Auschwitz-Birkenau, and Majdanek. Extermination camps were killing centers designed to carry out genocide. About three million Jews were gassed in extermination camps.
Richard Freund, an American archaeologist at the University of Hartford, in Connecticut, specializes in Jewish history, modern and ancient. He has been traversing the globe for almost three decades, working at sites as varied as Qumran, where the Dead Sea Scrolls were discovered, and at Sobibor, a Nazi extermination camp in eastern Poland. Unusually for a man in his profession, he rarely puts trowel to earth. Instead, Freund, who is rumpled and stout, with eyes that seem locked in a perpetual squint, practices what he calls “noninvasive archaeology,” which uses ground-penetrating radar and other types of computerized electronic technology to discover and describe structures hidden underground.
Höss oversaw the rapid construction of a gigantic new annex called Birkenau containing four large gas chamber-crematory buildings and scores of huts for slave laborers. From the moment it became operational in the spring of 1943, Auschwitz-Birkenau served as the focal point of the Nazi effort to exterminate the Jews. Hour after hour, trainloads of Jews arrived from all over Europe. The people were subjected to a life-and-death selection process by SS medical personnel such as Dr. Josef Mengele. Adults who seemed fit for labor were allowed to live and were marched away. All others, including children, the elderly and anyone deemed unfit went straight to the gas chambers.
For the first time, it’s possible to say why the Mossad failed to apprehend the man who was perhaps the most wanted Nazi to survive World War II. Documents and interviews reveal that contrary to popular belief, for most of the time that Mengele was in hiding, the Mossad wasn’t looking for him at all — or placed finding him far down its to-do list. My new research sheds light on a time when realism and maturity shaped the agency’s priorities, rather than an understandable desire to spill Nazi blood.
Additional barriers stemmed from antisemitism, which was rampant in the cultural climate of Eastern Europe. Gentile rescuers thus often feared censure from their fellow citizens. Moreover, significant numbers of gentiles had to confront their own personal, sometimes unconscious, anti-Jewish feelings. Indeed, postwar interviews with rescuers have shown that although they tended to describe the Jews they saved as fine people, many characterized Jews in general as dirty, loud, greedy, aggressive, dishonest, deceitful, or underhanded.
Reichsführer-SS Heinrich Himmler visited Auschwitz-Birkenau on July 17 and 18, 1942 and watched the gassing of 449 women and children in Bunker No. 1, according to his biographer Peter Padfield. On July 23, 1942, Himmler ordered the quarantine of the Birkenau camp because of a typhus epidemic, but the gassing of the Jews continued. On December 28, 1942, Himmler issued an order that the death rate "must be reduced at all costs" according to document 2172-PS that was introduced at the Nuremberg IMT. He meant the death rate from typhus; the gassing of the Jews did not stop.
Nazi persecution, arrests, and deportations were directed against all members of Jewish families, as well as many Gypsy families, without concern for age. Homeless, often orphaned, many children had frequently witnessed the murder of parents, siblings, and relatives. They faced starvation, illness, brutal labor, and other indignities until they were consigned to the gas chambers.
When exactly Hitler settled on straightforward murder as a means of removal has been harder to pinpoint. As Yale historian Timothy Snyder writes, “It cannot be stressed enough that the Nazis did not know how to eradicate the Jews when they began the war against the Soviet Union [in the summer of 1941]… They could not be confident that SS men would shoot women and children in large numbers.” But as Operation Barbarossa, the name for the Nazi invasion of the U.S.S.R, proved during the mass shootings of June 1941 and the massacres at Kiev in September, the Order Police and Einsatzgrüppen were more than willing to commit mass murders. This meant Hitler could take the solution to the Jewish problem to its “furthest extremes,” in the words of Philipp Bouhler, the senior Nazi official responsible for the euthanasia program that killed more than 70,000 handicapped German people.
The Warsaw Ghetto Uprising was the largest ghetto revolt. Massive deportations (or Aktions) had been held in the ghetto from July to September 1942, emptying the ghetto of the majority of Jews imprisoned there. When the Germans entered the ghetto again in January 1943 to remove several thousand more, small unorganized groups of Jews attacked them. After four days, the Germans withdrew from the ghetto, having deported far fewer people than they had intended. The Nazis reentered the ghetto on April 19, 1943, the eve of Passover, to evacuate the remaining Jews and close the ghetto. The Jews, using homemade bombs and stolen or bartered weapons, resisted and withstood the Germans for 27 days. They fought from bunkers and sewers and evaded capture until the Germans burned the ghetto building by building. By May 16 the ghetto was in ruins and the uprising crushed.
In 1988, West Germany allocated another $125 million for reparations. Companies such as BMW, Deutsche Bank, Ford, Opel, Siemens, and Volkswagen faced lawsuits for their use of forced labor during the war.[463] In response, Germany set up the "Remembrance, Responsibility and Future" Foundation in 2000, which paid €4.45 billion to former slave laborers (up to €7,670 each).[465] In 2013, Germany agreed to provide €772 million to fund nursing care, social services, and medication for 56,000 Holocaust survivors around the world.[466] The French state-owned railway company, the SNCF, agreed in 2014 to pay $60 million to Jewish-American survivors, around $100,000 each, for its role in the transport of 76,000 Jews from France to extermination camps between 1942 and 1944.[467]
As if cold-blooded murder of millions of Jews was not enough, it was done with extreme, perverse cruelty. The victims were packed into cattle trains with standing-room only and without food or water, or heat in the winter, or toilet facilities. Many did not arrive at the camps alive. Those who did arrive at their destination had their heads shaved, with the hair to be used for stuffing mattresses. Stripped of all clothing, most were herded naked into the gas chambers. Dr Johann Kremer, a German SS surgeon, described the gassing of a group of French Jews including 150 boys and girls under the age of 15:
Within one week from the start of Operation Barbarossa, Heydrich issued an order to his Einsatzkommandos for the on-the-spot execution of all Bolsheviks, interpreted by the SS to mean all Jews. One of the first indiscriminate massacres of men, women, and children in Reichskommissariat Ukraine took the lives of over 4,000 Polish Jews in occupied Łuck on 2–4 July 1941, murdered by Einsatzkommando 4a assisted by the Ukrainian People's Militia.[55] Formed officially on 20 August 1941, the Reichskommissariat Ukraine – stretching from prewar east-central Poland to Crimea – had become operational theatre of the Einsatzgruppe C. Within the Soviet Union proper, between 9 July 1941 and 19 September 1941 the city of Zhytomyr was made Judenfrei in three murder operations conducted by German and Ukrainian police in which 10,000 Jews perished.[41] In the Kamianets-Podilskyi massacre of 26–28 August 1941 some 23,600 Jews were shot in front of open pits (including 14,000–18,000 people expelled from Hungary).[41][56] After an incident in Bila Tserkva in which 90 small children left behind had to be shot separately, Blobel requested that Jewish mothers hold them in their arms during mass shootings.[57][58] Long before the conference at Wannsee, 28,000 Jews were shot by SS and Ukrainian military in Vinnytsia on 22 September 1941, followed by the 29 September massacre of 33,771 Jews at Babi Yar.[41][59] In Dnipropetrovsk, on 13 October 1941 some 10,000–15,000 Jews were shot.[60] In Chernihiv, 10,000 Jews were put to death and only 260 Jews were spared.[60] In mid-October, during the Krivoy-Rog massacre of 4,000–5,000 Soviet Jews the entire Ukrainian auxiliary police force actively participated.[61] In the first days of January 1942 in Kharkiv, 12,000 Jews were murdered, but smaller massacres continued in this period on daily basis in countless other locations.[60] In August 1942 in the presence of only a few German SS men over 5,000 Jews were massacred in Polish Zofjówka by the Ukrainian Auxiliary Police leading to the town's complete sweep from existence.[62]

The murder industry began in the Chelmno camp, built in December 1941. Work was carried out in special trucks, where the victims were asphyxiated by exhaust fumes, a method that had been tried before on those whose lives were deemed useless (the “Euthanasia Pro­gram”). From September 1939, about 100,000 “Aryan” Germans were assassinated in this manner, in what was named “Operation T4.” Two years later, the personnel responsible for the “euthanasia” program were called upon to apply their expertise to murdering Jews. In the single camp of Chelmno, 150,000 human beings were gassed to death, most of them brought to the camp from annexed territories, the Warthegau district of western Poland and the Lodz Ghetto.
Mengele managed to escape imprisonment after the war, first by working as a farm stableman in Bavaria, then by moving to South America. He became a citizen of Paraguay in 1959. He later moved to Brazil, where he met up with another former Nazi party member, Wolfgang Gerhard. In 1985, a multinational team of forensic experts traveled to Brazil in search of Mengele. They determined that a man named Gerhard had died of a stroke while swimming in 1979. Dental records later revealed that Mengele had, at some point, assumed Gerhard’s identity and was the stroke victim.
In 1942, Auschwitz II (Birkenau), originally intended to house slave laborers, began to be used instead as a combined labor camp and extermination camp.[23][24] Prisoners were transported there by rail from all over German-occupied Europe, arriving in daily convoys.[25] By July 1942, SS doctors were conducting "selections" where incoming Jews were segregated, and those considered able to work were admitted into the camp while those deemed unfit for labor were immediately killed in the gas chambers.[26] The arrivals that were selected to die, about three-quarters of the total,[a] included almost all children, women with small children, pregnant women, all the elderly, and all of those who appeared (in a brief and superficial inspection by an SS doctor) to be not completely fit and healthy.[28][29]