After the September 1939 German invasion of Poland (the beginning of World War II), anti-Jewish policy escalated to the imprisonment and eventual murder of European Jewry. The Nazis first established ghettos (enclosed areas designed to isolate and control the Jews) in the Generalgouvernement (a territory in central and eastern Poland overseen by a German civilian government) and the Warthegau (an area of western Poland annexed to Germany). Polish and western European Jews were deported to these ghettos where they lived in overcrowded and unsanitary conditions with inadequate food.
Medical experiments conducted on camp inmates by the SS were another distinctive feature.[51] At least 7,000 prisoners were subjected to experiments; most died as a result, during the experiments or later.[52] Twenty-three senior physicians and other medical personnel were charged at Nuremberg, after the war, with crimes against humanity. They included the head of the German Red Cross, tenured professors, clinic directors, and biomedical researchers.[53] Experiments took place at Auschwitz, Buchenwald, Dachau, Natzweiler-Struthof, Neuengamme, Ravensbrück, Sachsenhausen, and elsewhere. Some dealt with sterilization of men and women, the treatment of war wounds, ways to counteract chemical weapons, research into new vaccines and drugs, and the survival of harsh conditions.[52]
Who among gentile Poles was most likely to stand up for persecuted Jews? What propelled these rescuers to risk their lives for them? What characteristics, motivations, and circumstances did the rescuers share? Most attempts to answer these questions focus upon standard sociological categories: researchers consider the rescuers’ class, education, political and religious commitments, friendships with Jews, and level of anti-Jewish prejudice. The results of such investigations have not led to clear conclusions. Some studies suggest that economically deprived Christians more readily identified with Jewish suffering. Others conclude that intellectuals were more likely to have been protectors because they had better insight into German aims and were committed to undermining them.
Today it seems that Nazi war criminals escaped to Argentina using false identities supplied by the Red Cross, the humanitarian organisation has admitted ...  The International Committee of the Red Cross has said it unwittingly provided travel papers to at least 10 top Nazis, including Adolf Eichmann, Klaus Barbie, Erich Priebke and Josef Mengele ... A statement issued by the ICRC, from its Geneva headquarters, said they were among thousands of people found in refugee camps who were given Red Cross travel documents.
“I’ve offered three possibilities” to the museum, Freund said. The first was to try to partially excavate one section of the tunnel and protect it with climate-controlling plexiglass walls. Alternatively, a re-creation could be built, as had been done with the recently finished facsimile of King Tutankhamun’s tomb, in the Valley of the Kings, in Egypt. The last option, Freund allowed, was a “little futuristic”: Relying on the data from the scans, a 3-D film could be created so visitors could relive the experience of the escape.
Despite the Vatican failure to act, many priests, nuns, and laymen hid Jews in monasteries, convents, schools, and hospitals and protected them with false baptismal certificates. However, as Saul Friedlander’s memoirs show, many Catholic priests proselytized and converted their “guests.” Moreover, after the war, many Jewish children were never returned to Jewish families, even after lengthy court battles.
The Netherlands Institute for War Documentation commissioned a forensic study of the manuscripts after the death of Otto Frank in 1980. The material composition of the original notebooks and ink, and the handwriting found within them and the loose version were extensively examined. In 1986, the results were published: The handwriting attributed to Anne Frank was positively matched with contemporary samples of Anne Frank's handwriting, and the paper, ink, and glue found in the diaries and loose papers were consistent with materials available in Amsterdam during the period in which the diary was written.[56]
According to scholars Christian Gerlach and Peter Monteath, among others, the pivotal moment for Hitler’s decision came on December 12, 1941, at a secret meeting with some 50 Nazi officials, including Joseph Goebbels (Nazi minister of propaganda) and Hans Frank (governor of occupied Poland). Though no written documents of the meeting survive, Goebbels described the meeting in his journal on December 13, 1941:
However, an examination of other variables suggests that rescuers shared a cluster of common personal characteristics. One of these can be called individuality or separateness. Polish rescuers often did not quite fit into their social environments. To illustrate, the peasant Jan Rybak, who helped save both Jews and Russian prisoners of war during the German occupation, had little formal education but was nonetheless a compulsive reader. His knowledge and love for learning gained him the nickname philosopher. Moreover, he avoided alcohol and did not follow the local custom of wife beating.

Construction work on the first killing centre at Bełżec in occupied Poland began in October 1941, three months before the Wannsee Conference. The new facility was operational by March the following year.[75] By mid-1942, two more death camps had been built on Polish lands: Sobibór operational by May 1942, and Treblinka operational in July.[76] From July 1942, the mass murder of Polish and foreign Jews took place at Treblinka as part of Operation Reinhard, the deadliest phase of the Final Solution. More Jews were killed at Treblinka than at any other Nazi extermination camp apart from Auschwitz.[77] By the time the mass killings of Operation Reinhard ended in 1943, roughly two million Jews in German-occupied Poland had been murdered.[66] The total number of people killed in 1942 in Lublin/Majdanek, Bełżec, Sobibór, and Treblinka was 1,274,166 by Germany's own estimation, not counting Auschwitz II Birkenau nor Kulmhof.[78] Their bodies were buried in mass graves initially.[79] Both Treblinka and Bełżec were equipped with powerful crawler excavators from Polish construction sites in the vicinity, capable of most digging tasks without disrupting surfaces.[80] Although other methods of extermination, such as the cyanic poison Zyklon B, were already being used at other Nazi killing centres such as Auschwitz, the Aktion Reinhard camps used lethal exhaust gases from captured tank engines.[81]
Born on March 16, 1911 in Günzburg, Germany to a prosperous family, Josef Mengele was the eldest of 3 children. In 1935, he earned a PhD in physical anthropology from the University of Munich, and 2 years later he became the assistant of Dr. Otmar von Verschuer, a leading scientific figure known for his research with twins, at the Institute for Hereditary Biology and Racial Hygiene in Frankfurt. That same year, Mengele joined the Nazi Party, and in 1938, joined the SS. In 1940, he was drafted into the military, where he volunteered for medical service in the Waffen-SS. However, his time in the military was cut short after being wounded while on campaign and he was sent back to Germany, where he resumed work with von Verschuer at the Kaiser Wilhelm Institute for Anthropology.
His grip on German society tightened and those who publicly objected to Nazi policies were often sentenced to hard labour in the rapidly expanding concentration camp system. Jews were subjected to further laws restricting their rights, but rising anti-Semitism in Europe wasn’t limited to Germany. In the UK, Oswald Mosley’s British Union of Fascists gained support from sections of the public and press, even filling the Royal Albert Hall in April.
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."
After the December 12 meeting, these proclamations took a more precise tone: the Nazis needed to kill all Jews, including German Jews and Western European Jews, and they needed to do so systematically. What had started as uncertain and sporadic violence quickly turned into wholesale slaughter, complete with gas chambers and concentration camps. Six weeks later, SS chief Heinrich Himmler, the Nazi official responsible for the implementation of the Final Solution, ordered the first Jews of Europe to Auschwitz.
In his 1983 book, Popular Opinion and Political Dissent in the Third Reich, Ian Kershaw examined the Alltagsgeschichte (history of everyday life) in Bavaria during the Nazi period. The most common viewpoint of Bavarians was indifference towards what was happening to the Jews, he wrote. Most Bavarians were vaguely aware of the genocide, but they were vastly more concerned about the war.[472] Kershaw argued that "the road to Auschwitz was built by hate, but paved with indifference".[473] His assessment faced criticism from historians Otto Dov Kulka and Michael Kater. Kater maintained that Kershaw had downplayed the extent of popular antisemitism. Although most of the "spontaneous" antisemitic actions of Nazi Germany had been staged, Kater argued that these had involved substantial numbers of Germans, and therefore it was wrong to view the extreme antisemitism of the Nazis as coming solely from above.[474] Kulka argued that "passive complicity" would be a better term than "indifference".[475] Focusing on the views of Germans opposed to the Nazi regime, the German historian Christof Dipper, in his essay "Der Deutsche Widerstand und die Juden" (1983), argued that the majority of the anti-Nazi national-conservatives were antisemitic. No one in the German resistance supported the Holocaust, but Dipper wrote that the national conservatives did not intend to restore civil rights to the Jews after the planned overthrow of Hitler.[474]

A sampling of Wilson’s concerns as she matured appears in the interstices of her exchanges with Otto Frank, which, remarkably, date from 1959 until his death, in 1980. For instance: “The year was 1968—etched in my mind. I can’t ever forget it. Otis Redding was ‘Sittin’ on the Dock of the Bay’ . . . while we hummed along to ‘Hey Jude’ by the Beatles.” “In 1973-74,” she reports, “I was wearing headbands, pukka-shell necklaces, and American Indian anything. Tattoos were a rage”—but enough. Tattoos were the rage, she neglects to recall, in Auschwitz; and of the Auschwitz survivor who was her patient correspondent for more than two decades, Wilson remarks, “Well, what choice did the poor man have? Whenever an attack of ‘I-can’t-take-this-any-longer’ would hit me, I’d put it all into lengthy diatribes to my distant guru, Otto Frank.”

In 1992, DNA testing confirmed Mengele's identity beyond doubt,[114] but family members refused repeated requests by Brazilian officials to repatriate the remains to Germany.[115] The skeleton is stored at the São Paulo Institute for Forensic Medicine, where it is used as an educational aid during forensic medicine courses at the University of São Paulo's medical school.[116]

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]
At the three Reinhard camps the victims were killed by the exhaust fumes of stationary diesel engines.[279] Gold fillings were pulled from the corpses before burial, but the women's hair was cut before death. At Treblinka, to calm the victims, the arrival platform was made to look like a train station, complete with fake clock.[300] Majdanek used Zyklon-B gas in its gas chambers.[301] In contrast to Auschwitz, the three Reinhard camps were quite small.[302] Most of the victims at these camps were buried in pits at first. Sobibór and Bełżec began exhuming and burning bodies in late 1942, to hide the evidence, as did Treblinka in March 1943. The bodies were burned in open fireplaces and the remaining bones crushed into powder.[303]
The plans to exterminate all the Jews of Europe was formalized at the Wannsee Conference, held at an SS guesthouse near Berlin,[24] on 20 January 1942. The conference was chaired by Heydrich and attended by 15 senior officials of the Nazi Party and the German government. Most of those attending were representatives of the Interior Ministry, the Foreign Ministry, and the Justice Ministry, including Ministers for the Eastern Territories.[25] At the conference, Heydrich indicated that approximately 11,000,000 Jews in Europe would fall under the provisions of the "Final Solution". This figure included not only Jews residing in Axis-controlled Europe, but also the Jewish populations of the United Kingdom and of neutral nations (Switzerland, Ireland, Sweden, Spain, Portugal, and European Turkey).[2] Eichmann's biographer David Cesarani wrote that Heydrich's main purpose in convening the conference was to assert his authority over the various agencies dealing with Jewish issues. "The simplest, most decisive way that Heydrich could ensure the smooth flow of deportations" to death camps, according to Cesarani, "was by asserting his total control over the fate of the Jews in the Reich and the east" under the single authority of the RSHA.[26] A copy of the minutes of this meeting was found by the Allies in March 1947;[27] it was too late to serve as evidence during the first Nuremberg Trial, but was used by prosecutor General Telford Taylor in the subsequent Nuremberg Trials.[28]

Throughout the late-1930s, the Nazi government began to forcibly acquire ethnically German territory in Austria and Czechoslovakia that was taken from Germany at the end of the First World War. Although the international community initially allowed Germany to incorporate these territories into the growing German Empire, it became increasingly clear that Hitler’s ambition did not stop at these small territories. When Germany invaded Poland on September 1, 1939, Britain and France responded by declaring war on Germany, beginning the Second World War.
As Siksnianas led Freund through the woods, he told an astonishing story about a group of prisoners who had reportedly tunneled to freedom and joined partisan fighters hiding out in the forest. But when Freund asked to see exactly how they made it out, he got only shrugs. No one could show him; no one knew. Because a tunnel had never been definitively located and documented, the story had come to take on the contours of a fable, and three-quarters of a century on, it seemed destined to remain a legend without any verifiable evidence to back it up—a crucial piece of the historical record, lost to time.
When Hitler came to power legally on January 30, 1933, as the head of a coalition government, his first objective was to consolidate power and to eliminate political opposition. The assault against the Jews began on April 1 with a boycott of Jewish businesses. A week later the Nazis dismissed Jews from the civil service, and by the end of the month the participation of Jews in German schools was restricted by a quota. On May 10 thousands of Nazi students, together with many professors, stormed university libraries and bookstores in 30 cities throughout Germany to remove tens of thousands of books written by non-Aryans and those opposed to Nazi ideology. The books were tossed into bonfires in an effort to cleanse German culture of “un-Germanic” writings. A century earlier Heinrich Heine—a German poet of Jewish origin—had said, “Where one burns books, one will, in the end, burn people.” In Nazi Germany the time between the burning of Jewish books and the burning of Jews was eight years.
The impact of the Holocaust varied from region to region and from year to year in the 21 countries that were directly affected. Nowhere was the Holocaust more intense and sudden than in Hungary. What took place over several years in Germany occurred over 16 weeks in Hungary. Entering the war as a German ally, Hungary had persecuted its Jews but not permitted the deportation of Hungarian citizens. In 1941 foreign Jewish refugees were deported from Hungary and were shot by Germans in Kam’yanets-Podilskyy, Ukraine. After Germany invaded Hungary on March 19, 1944, the situation changed dramatically. By mid-April the Nazis had confined Jews to ghettos. On May 15, deportations began, and over the next 55 days the Nazis deported more than 437,000 Jews from Hungary to Auschwitz on 147 trains.
Victims usually arrived at the camps by freight train.[278] Almost all arrivals at the Operation Reinhard camps of Treblinka, Sobibór, and Bełżec were sent directly to the gas chambers,[279] with individuals occasionally selected to replace dead workers.[280] At Auschwitz, camp officials usually subjected individuals to selections;[281] about 25%[282] of the new arrivals were selected to work.[281] Those selected for death at all camps were told to undress and hand their valuables to camp workers.[283] They were then herded naked into the gas chambers. To prevent panic, they were told the gas chambers were showers or delousing chambers.[284] The procedure at Chełmno was slightly different. Victims there were placed in a mobile gas van and asphyxiated, while being driven to prepared burial pits in the nearby forests. There the corpses were unloaded and buried.[285]
The Majdanek camp served from time to time as a killing site for Jews residing in the Generalgouvernement. In its gas chambers, the SS killed tens of thousands of Jews, primarily forced laborers too weak to work. The SS and police killed at least 152,000 people, mostly Jews, but also a few thousand Roma (Gypsies), in gas vans at the Chelmno killing center about thirty miles northwest of Lodz. In the spring of 1942, Himmler designated Auschwitz II (Auschwitz-Birkenau) as a killing facility. SS authorities murdered approximately one million Jews from various European countries at Auschwitz-Birkenau.

Its historical significance makes the term Final Solution the most important example of the ability of Nazi language to integrate potentially different if not divergent approaches towards the so-called Jewish question into a conceptual frame of reference that helped facilitate systematic mass murder and to hide the Third Reich's genocidal policies behind technocratic abstractions, thus providing legitimization for perpetrators and enabling bystanders to claim not to know what was going on. Despite its inherent problems, most notably in evoking the illusion of coordinated planning and systematic implementation, the term Final Solution remains crucial for recognizing the process character of the Holocaust as a key element in a broader history of state-sponsored mass murder during the Nazi era.

Meanwhile, Zvi Aharoni, one of the Mossad agents who had been involved in the Eichmann capture, was placed in charge of a team of agents tasked with tracking down Mengele and bringing him to trial in Israel. Their inquiries in Paraguay revealed no clues to his whereabouts, and they were unable to intercept any correspondence between Mengele and his wife Martha, who was then living in Italy. Agents that were following Rudel's movements also failed to produce any leads.[90] Aharoni and his team followed Gerhard to a rural area near São Paulo, where they identified a European man whom they believed to be Mengele.[91] This potential breakthrough was reported to Harel, but the logistics of staging a capture, the budgetary constraints of the search operation, and the priority of focusing on Israel's deteriorating relationship with Egypt led the Mossad chief to call off the hunt for Mengele in 1962.[92]