While concentration camps were meant to work and starve prisoners to death, extermination camps (also known as death camps) were built for the sole purpose of killing large groups of people quickly and efficiently. The Nazis built six extermination camps, all in Poland: Chelmno, Belzec, Sobibor, Treblinka, Auschwitz, and Majdanek. (Auschwitz and Majdanek were both concentration and extermination camps.)
Genealogical Studies in the Cases of Cleft Lip-Jaw-Palate (1938), his medical dissertation, earned him a doctorate in medicine from Frankfurt University. Studying the influence of genetics as a factor in the occurrence of this deformity, Mengele conducted research on families who exhibited these traits in multiple generations. The work also included notes on other abnormalities found in these family lines.[7][122]
In June 1941 Germany attacked the Soviet Union and began the "Final Solution." Four mobile killing groups were formed called Einsatzgruppen A, B, C and D. Each group contained several commando units. The Einsatzgruppen gathered Jews town by town, marched them to huge pits dug earlier, stripped them, lined them up, and shot them with automatic weapons. The dead and dying would fall into the pits to be buried in mass graves. In the infamous Babi Yar massacre, near Kiev, 30,000-35,000 Jews were killed in two days. In addition to their operations in the Soviet Union, the Einsatzgruppen conducted mass murder in eastern Poland, Estonia, Lithuania and Latvia. It is estimated that by the end of 1942, the Einsatzgruppen had murdered more than 1.3 million Jews.
Shown in the 1944 photo above, from left to right, are Dr. Josef Mengele, Richard Baer, Karl Hoecker, and Walter Schmidetski. Richard Baer, known as the last Commandant of Auschwitz, was the commander of the main camp; his adjutant was Karl Hoecker. Dr. Josef Mengele was one of 30 SS officers at Auschwitz II, aka Birkenau, who decided who would live and who would die in the gas chambers.
In April 1944, two Jewish inmates escaped from Auschwitz and made it safely into Czechoslovakia. One of them, Rudolf Vrba, submitted a detailed report to the Papal Nuncio in Slovakia which was then forwarded to the Vatican, received there in mid-June. Thus far, Pope Pius XII had not issued a public condemnation of Nazi maltreatment and subsequent mass murder of Jews, and he chose to continue his silence.
On 6 January 1942, the Soviet Minister of Foreign Affairs, Vyacheslav Molotov, sent out diplomatic notes about German atrocities. The notes were based on reports about bodies surfacing from poorly covered graves in pits and quarries, as well as mass graves found in areas the Red Army had liberated, and on witness reports from German-occupied areas.[335] The following month, Szlama Ber Winer escaped from the Chełmno concentration camp in Poland, and passed detailed information about it to the Oneg Shabbat group in the Warsaw Ghetto. His report, known by his pseudonym as the Grojanowski Report, had reached London by June 1942.[288][336] Also in 1942, Jan Karski sent information to the Allies after being smuggled into the Warsaw Ghetto twice.[337][s] On 27 April 1942, Vyacheslav Molotov sent out another note about atrocities.[335] In late July or early August 1942, Polish leaders learned about the mass killings taking place inside Auschwitz. The Polish Interior Ministry prepared a report, Sprawozdanie 6/42,[340] which said at the end:
One of the Auschwitz survivors who was selected by Dr. Josef Mengele for his cruel and horrific experiments was Yitzchak Ganon, a Greek Jew who was deported, along with his parents and 5 brothers and sisters to Auschwitz in 1944, according to a news article by Alan Hall, published on December 11, 2009. Ganon told reporter Alan Hall that he was selected for an experiment in which Dr. Mengele removed one of his kidneys without an anesthetic: "He cut into me without an anesthetic. The pain was indescribable. I felt every slice of the knife. Then I saw my kidney pulsating in his hand. [...] After the operation I was given no painkillers and put to work. I cleaned up after the bloody operations carried out by Mengele."
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]
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]
Begin thought settling the score with Mengele would show Palestinian leaders (and the Israeli public) that they would have to pay a price for harming Israelis. His attitude was reflected in a message he sent to President Ronald Reagan when he sent the Israeli Army into Lebanon in 1982, saying that he felt as if “I have sent an army to Berlin to wipe out Hitler in the bunker.”

^ Browning i, Christopher (2007). The Origins of the Final Solution: The Evolution of Nazi Jewish Policy, September 1939 – March 1942. U of Nebraska Press. "In a brief two years between the autumn of 1939 and the autumn of 1941, Nazi Jewish policy escalated rapidly from the pre-war policy of forced emigration to the Final Solution as it is now understood—the systematic attempt to murder every last Jew within the German grasp.

Another Polish courier, Jan Karski, reached the west in November 1942, carrying messages from Jewish leaders in Poland. He had himself witnessed the conditions in the Warsaw ghetto and in what he believed to be the Belzec death camp, and was eager to inform the world. Karski saw the British foreign secretary, Anthony Eden, and US President Roosevelt, but they seemed to be more interested in military intelligence than in atrocity stories. Partly as a result of Karski's mission, however, the Allies agreed to a joint declaration, read to the British Parliament on 17 December, which acknowledged Nazi war crimes and threatened punishment for the perpetrators. Subsequently millions of leaflets were dropped in the course of bombing raids on German cities to inform Germans of the facts, but these had little or no effect.
Like the network of concentration camps that followed, becoming the killing grounds of the Holocaust, Dachau was under the control of Heinrich Himmler, head of the elite Nazi guard, the Schutzstaffel (SS), and later chief of the German police. By July 1933, German concentration camps (Konzentrationslager in German, or KZ) held some 27,000 people in “protective custody.” Huge Nazi rallies and symbolic acts such as the public burning of books by Jews, Communists, liberals and foreigners helped drive home the desired message of party strength.
Historians of the Holocaust are divided into two schools: the “intentionalists” insist on the central role of Nazi ideology and believe that there was a carefully prepared plan for the extermination of European Jewry; the “functionalists” or “structuralists” by contrast, stress the chaotic nature of the Nazi system, a non-design reflected in their foreign and economic policies as well. According to the latter school, it was this inherent disorder rather than premeditated design that led, through a process of cumulative radicalization, to the systematic extermination of European Jewry.
In 2010, the Culpeper County, Virginia school system banned the 50th Anniversary "Definitive Edition" of Anne Frank: The Diary of a Young Girl, due to "complaints about its sexual content and homosexual themes."[49] This version "includes passages previously excluded from the widely read original edition.... Some of the extra passages detail her emerging sexual desires; others include unflattering descriptions of her mother and other people living together."[50] After consideration, it was decided a copy of the newer version would remain in the library and classes would revert to using the older version.
Anne Frank escaped gassing. One month before liberation, not yet sixteen, she died of typhus fever, an acute infectious disease carried by lice. The precise date of her death has never been determined. She and her sister, Margot, were among three thousand six hundred and fifty-nine women transported by cattle car from Auschwitz to the merciless conditions of Bergen-Belsen, a barren tract of mud. In a cold, wet autumn, they suffered through nights on flooded straw in overcrowded tents, without light, surrounded by latrine ditches, until a violent hailstorm tore away what had passed for shelter. Weakened by brutality, chaos, and hunger, fifty thousand men and women—insufficiently clothed, tormented by lice—succumbed, many to the typhus epidemic.
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]