Yugoslavia and Greece were invaded in April 1941 and surrendered before the end of the month. Germany and Italy divided Greece into occupation zones but did not eliminate it as a country. Yugoslavia, home to around 80,000 Jews, was dismembered; regions in the north were annexed by Germany and regions along the coast made part of Italy. The rest of the country was divided into the Independent State of Croatia, nominally an ally of Germany, and Serbia, which was governed by a combination of military and police administrators.[167] According to historian Jeremy Black, Serbia was declared free of Jews in August 1942.[168] Croatia's ruling party, the Ustashe, killed the country's Jews, and killed or expelled Orthodox Christian Serbs and Muslims.[167] Jews and Serbs alike were "hacked to death and burned in barns", according to Black. One difference between the Germans and Croatians was that the Ustashe allowed its Jewish and Serbian victims to convert to Catholicism so they could escape death.[168]
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]
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.

Broadly speaking, the extermination of Jews was carried out in two major operations. With the onset of Operation Barbarossa, launched from occupied Poland in June 1941, mobile killing units of the SS and Orpo were dispatched to Soviet controlled territories of eastern Poland and further into the Soviet republics for the express purpose of killing all Jews, both Polish and Soviet. During the massive chase after the fleeing Red Army, Himmler himself visited Białystok in the beginning of July 1941, and requested that, "as a matter of principle, any Jew" behind the German-Soviet frontier "was to be regarded as a partisan". His new orders gave the SS and police leaders full authority for the mass murder behind the front-lines. By August 1941, all Jewish men, women, and children were shot.[21] In the second phase of annihilation, the Jewish inhabitants of central, western, and south-eastern Europe were transported by Holocaust trains to camps with newly-built gassing facilities. Raul Hilberg wrote: "In essence, the killers of the occupied USSR moved to the victims, whereas outside this arena, the victims were brought to the killers. The two operations constitute an evolution not only chronologically, but also in complexity."[9] Massacres of about one million Jews occurred before plans for the Final Solution were fully implemented in 1942, but it was only with the decision to annihilate the entire Jewish population that extermination camps such as Auschwitz II Birkenau and Treblinka were fitted with permanent gas chambers to kill large numbers of Jews in a relatively short period of time.[22][23]
Their decency exposed them to the dangers of discovery and denunciation. If caught, they faced torture, deportation to concentration camps, or execution. Their behavior was atypical even in their own communities, where the attitude of the majority was characterized by inertia, indifference, and open complicity in the persecution and mass murder of Europe’s Jews.
In his monograph, The Origins Of The Final Solution: The Evolution of Nazi Jewish Policy, September 1939 – March 1942, Christopher Browning argues that Nazi policy toward the Jews was radicalized twice: in September 1939, when the invasion of Poland implied policies of mass expulsion and massive loss of Jewish lives; and in spring 1941, when preparation for Operation Barbarossa involved the planning of mass execution, mass expulsion, and starvation – to dwarf what had happened in Jewish Poland.[113]

By the spring of 1942, the Nazis had established six killing centers (death camps) in Poland: Chelmno (Kulmhof), Belzec, Sobibor, Treblinka, Maidanek and Auschwitz. All were located near railway lines so that Jews could be easily transported daily. A vast system of camps (called Lagersystem) supported the death camps. The purpose of these camps varied: some were slave labor camps, some transit camps, others concentration camps and their sub­camps, and still others the notorious death camps. Some camps combined all of these functions or a few of them. All the camps were intolerably brutal.
In response to a typhus epidemic in the women's camp, Mengele cleared one block of six hundred Jewish women and sent them to their deaths in the gas chambers. The building was then cleaned and disinfected, and the occupants of a neighboring block were bathed, de-loused, and given new clothing before being moved into the clean block. This process was repeated until all of the barracks were disinfected. Similar procedures were used for later epidemics of scarlet fever and other diseases, with infected prisoners being killed in the gas chambers. For these actions, Mengele was awarded the War Merit Cross (Second Class with swords) and was promoted in 1944 to First Physician of the Birkenau subcamp.[37]
A subsidiary aim of Operation Reinhard was to exploit a small minority of Jews residing in the Generalgouvernement as forced laborers before killing them. As the ghettos in Poland were systematically liquidated, those selected to live temporarily were deported to Operation Reinhard labor camps and to the concentration camp Lublin/Majdanek. This camp was established in 1941 under the authority of the Inspectorate of Concentration Camps in Berlin. Though conceived of and functioning in practice primarily as a concentration camp, housing political prisoners and Jewish forced laborers, Majdanek served from time to time as a killing site for Jews residing in the Generalgouvernement. It had gas chambers, in which the SS killed tens of thousands of Jews, primarily forced laborers too weak to work.
Known as Kristallnacht (or "Night of Broken Glass"), the attacks were partly carried out by the SS and SA,[122] but ordinary Germans joined in; in some areas, the violence began before the SS or SA arrived.[123] Over 7,500 Jewish shops (out of 9,000) were looted and attacked, and over 1,000 synagogues damaged or destroyed. Groups of Jews were forced by the crowd to watch their synagogues burn; in Bensheim they were forced to dance around it, and in Laupheim to kneel before it.[124] At least 90 Jews died. The damage was estimated at 39 million Reichmarks.[125] Cesarani writes that "[t]he extent of the desolation stunned the population and rocked the regime."[120] Thirty-thousand Jews were sent to the Dachau, Buchenwald and Sachsenhausen concentration camps.[126] Many were released within weeks; by early 1939, 2,000 remained in the camps.[127] German Jewry was held collectively responsible for restitution of the damage; they also had to pay an "atonement tax" of over a billion Reichmarks. Insurance payments for damage to their property were confiscated by the government. A decree on 12 November 1938 barred Jews from most of the remaining occupations they had been allowed to hold.[128] Kristallnacht marked the end of any sort of public Jewish activity and culture, and Jews stepped up their efforts to leave the country.[129]
People in Tokyo were not united. I felt it silly to deal with them. So, I made up my mind not to wait for their reply. I knew that somebody would surely complain about me in the future. But, I myself thought this would be the right thing to do. There is nothing wrong in saving many people's lives .... The spirit of humanity, philanthropy ... neighborly friendship ... with this spirit, I ventured to do what I did, confronting this most difficult situation ---and because of this reason, I went ahead with redoubled courage. ”
After the end of World War II, surviving archival documents provided a clear record of the Final Solution policies and actions of Nazi Germany. They included the Wannsee Conference Protocol, which documented the co-operation of various German state agencies in the SS-led Holocaust, as well as some 3,000 tons of original German records captured by Allied armies,[23][29] including the Einsatzgruppen reports, which documented the progress of the mobile killing units assigned, among other tasks, to kill Jewish civilians during the attack on the Soviet Union in 1941. The evidential proof which documented the mechanism of the Holocaust was submitted at Nuremberg.[29]
Just imagine how interesting it would be if I were to publish a romance of the "Secret Annex." The title alone would be enough to make people think it was a detective story. But, seriously, it would be quite funny 10 years after the war if we Jews were to tell how we lived and what we ate and talked about here. Although I tell you a lot, still, even so, you only know very little of our lives.
Of all the aspects of Mengele’s character which are of interest, his research on twins is the focus of the C.A.N.D.L.E.S. organization. Beginning in 1944, twins were selected and placed in special barracks. Some of those selected - like Irene and Rene Guttman were already in the camp. Others like Eva and Miriam Mozes were selected on the ramp and placed in the twins barracks. It is believed that Mengele had worked with twins under Verschuer at the University of Frankfurt. Auschwitz offered Mengele unlimited number of specimens where twins could be studied at random. According to Dr. Miklos Nyiszli in Auschwitz: A Doctor's Eyewitness Account, twins provided the perfect experimental specimens. One could serve as a control while the other endured the experiments. It was well known in the camp that when a twin went to the infirmary, (s)he never returned and that the other twin disappeared too (Eva Mozes Kor, Echoes from Auschwitz). Nyiszli describes the shots of phenol which were used to kill the second twin.
The industrialization and scale of the murder was unprecedented. Killings were systematically conducted in virtually all areas of occupied Europe—more than 20 occupied countries.[40] Close to three million Jews in occupied Poland and between 700,000 and 2.5 million Jews in the Soviet Union were killed. Hundreds of thousands more died in the rest of Europe.[41] Victims were transported in sealed freight trains from all over Europe to extermination camps equipped with gas chambers.[42] The stationary facilities grew out of Nazi experiments with poison gas during the Aktion T4 mass murder ("euthanasia") programme against the disabled and mentally ill, which began in 1939.[43] The Germans set up six extermination camps in Poland: Auschwitz II-Birkenau (established October 1941); Majdanek (October 1941); Chełmno (December 1941); and the three Operation Reinhard camps, Belzec, Sobibor, and Treblinka, in 1942.[44] A seventh death camp, Maly Trostenets, was established near Minsk in Belarus, then part of the Reichskommissariat Ostland.[45] Discussions at the Wannsee Conference in January 1942 made it clear that the German "final solution of the Jewish question" was intended eventually to include Britain and all the neutral states in Europe, including Ireland, Switzerland, Turkey, Sweden, Portugal, and Spain.[46]
Relying on a surveying device known as a total station—the tripod-mounted optical instrument employed by construction and road crews—Reeder set about measuring minute elevation changes across the land, searching for subtle gradations and anomalies. He zeroed in on a hummock that looked like the earthen side of a bunker, long since overgrown with moss and foliage, and roughly 100 feet away, a telltale dip in the earth.
Here over an acre of ground lay dead and dying people. You could not see which was which. ... The living lay with their heads against the corpses and around them moved the awful, ghostly procession of emaciated, aimless people, with nothing to do and with no hope of life, unable to move out of your way, unable to look at the terrible sights around them ... Babies had been born here, tiny wizened things that could not live. ... A mother, driven mad, screamed at a British sentry to give her milk for her child, and thrust the tiny mite into his arms. ... He opened the bundle and found the baby had been dead for days. This day at Belsen was the most horrible of my life.
The rioting was triggered by the assassination of Ernst vom Rath, a German diplomat in Paris, by a Polish Jewish teenager, Herschel Grynszpan, on November 7th. Grynszpan did not attempt to escape and claimed that the assassination was motivated by the persecution of the Jewish people. Despite being attended to by Hitler’s personal physician, vom Rath died two days later.
In Germany, the Nazis had been murdering mentally and physically disabled people as part of its euthanasia programme since 1939. In the beginning, doctors killed them by lethal injection. This was not considered fast enough, so they developed a new process of gassing that was faster and more effective in killing large numbers of people. Over 70,000 people were killed as part of the euthanasia programme.
Responding with alarm to Hitler’s rise, the Jewish community sought to defend their rights as Germans. For those Jews who felt themselves fully German and who had patriotically fought in World War I, the Nazification of German society was especially painful. Zionist activity intensified. “Wear it with pride,” journalist Robert Weltsch wrote in 1933 of the Jewish identity the Nazis had so stigmatized. Religious philosopher Martin Buber led an effort at Jewish adult education, preparing the community for the long journey ahead. Rabbi Leo Baeck circulated a prayer for Yom Kippur (the Day of Atonement) in 1935 that instructed Jews on how to behave: “We bow down before God; we stand erect before man.” Yet while few, if any, could foresee its eventual outcome, the Jewish condition was increasingly perilous and was expected to worsen.
For Begin, getting to Mengele was not just a matter of the past. He equated Yasir Arafat with Hitler. “Unlike other Israelis, who saw the Holocaust as a one-time historical catastrophe,” said Shlomo Nakdimon, a prominent Israeli journalist who was close to Begin, “Begin believed with all his heart that the lesson of the Holocaust is that the Jewish people must protect themselves in their own country in order to prevent a renewed threat to their existence.”
In his 1965 essay "Command and Compliance", which originated in his work as an expert witness for the prosecution at the Frankfurt Auschwitz Trials, the German historian Hans Buchheim wrote there was no coercion to murder Jews and others, and all who committed such actions did so out of free will. Buchheim wrote that chances to avoid executing criminal orders "were both more numerous and more real than those concerned are generally prepared to admit",[468] and that he found no evidence that SS men who refused to carry out criminal orders were sent to concentration camps or executed.[469] Moreover, SS rules prohibited acts of gratuitous sadism, as Himmler wished for his men to remain "decent"; acts of sadism were carried out on the initiative of those who were either especially cruel or wished to prove themselves ardent National Socialists.[468] Finally, he argued that those of a non-criminal bent who committed crimes did so because they wished to conform to the values of the group they had joined and were afraid of being branded "weak" by their colleagues if they refused.[470]
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]