With the invasion of the Soviet Union on June 22 1941, the Nazis launched a crusade against 'Judaeo-Bolshevism', the supposed Jewish-Communist conspiracy. Behind the front lines, four police battalions called Einsatzgruppen (operations groups) moved from town to town in the newly occupied Soviet territories, rounding up Jewish men and suspected Soviet collaborators and shooting them. In subsequent sweeps, making heavy use of local volunteers, the Einsatzgruppen targeted Jewish women and children as well. In total, the Einsaztgruppen murdered some two million people, almost all Jews.
Holocaust scholar and Christian ethicist David Gushee highlighted other traits in his book, Righteous Gentiles of the Holocaust. “Some rescuers appear to have been adventuresome types, and others drew upon a sense of social marginality as a resource for compassion. Another mark of rescuer character is the nearly universal unwillingness to accept praise for their deeds. ‘It is what anyone would have done,’ they say of behaviour that almost no one did. For them to rescue Jews was the perfectly natural and obvious course of action. People needed help. So help was offered.”

Fair warning: this book will bring you to tears. It's going to keep you up at night. It will give you all the feelings possible—you're going to laugh at Anne's biting wit and then be furious that her life was cut short by Nazism. You're going to feel her claustrophobia, her hope, and her fear. You'll want to strangle a few of her housemates (because we see their annoying qualities magnified through the lens of Anne's astute observation).

France had approximately 300,000 Jews, divided between the German-occupied north and the unoccupied collaborationist southern areas under the Vichy regime. The occupied regions were under the control of a military governor, and there, anti-Jewish measures were not enacted as quickly as they were in the Vichy-controlled areas.[163] In July 1940, the Jews in the parts of Alsace-Lorraine that had been annexed to Germany were expelled into Vichy France.[164] Vichy France's government implemented anti-Jewish measures in French Algeria and the two French Protectorates of Tunisia and Morocco.[165] Tunisia had 85,000 Jews when the Germans and Italians arrived in November 1942. An estimated 5,000 Jews were subjected to forced labor.[166]
Meanwhile, sightings of Josef Mengele were being reported all over the world. Wiesenthal claimed to have information that placed Mengele on the Greek island of Kythnos in 1960,[103] in Cairo in 1961,[104] in Spain in 1971,[105] and in Paraguay in 1978, eighteen years after he had left the country.[106] He insisted as late as 1985 that Mengele was still alive—six years after he had died—having previously offered a reward of US$100,000 in 1982 for the fugitive's capture.[107] Worldwide interest in the case was heightened by a mock trial held in Jerusalem in February 1985, featuring the testimonies of over one hundred victims of Mengele's experiments. Shortly afterwards, the West German, Israeli, and U.S. governments launched a coordinated effort to determine Mengele's whereabouts. The West German and Israeli governments offered rewards for his capture, as did The Washington Times and the Simon Wiesenthal Center.[108]
The conference at Wannsee gave impetus to the so-called second sweep of the Holocaust by the bullet in the east. Between April and July 1942 in Volhynia, 30,000 Jews were murdered in death pits with the help of dozens of newly formed Ukrainian Schutzmannschaft.[67] Owing to good relations with the Ukrainian Hilfsverwaltung,[68] these auxiliary battalions were deployed by the SS also in Russia Center, Russia South, and in Byelorussia; each with about 500 soldiers divided into three companies.[69] They participated in the extermination of 150,000 Volhynian Jews alone, or 98 percent of the Jewish inhabitants of the entire region.[70] In July 1942 the Completion of the Final Solution in the General Government territory which included Distrikt Galizien, was ordered personally by Himmler. He set the initial deadline for 31 December 1942.[71]
While there were only 23 main camps between 1933 to 1945, the Nazi regime established some 20,000 other camps used for forced labor, transit or temporary internment. During the Holocaust it is estimated that 6 million Jews were slaughtered along with, 3 million Soviet prisoners of war, 3 million Polish Catholics, 700,000 Serbians, 250,000 Gypsies, Sinti, and Lalleri, 80,000 Germans (for political reasons), 70,000 German handicapped, 12,000 homosexuals, and 2,500 Jehovah’s Witnesses.
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]

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]
Before the war, Mengele had received doctorates in anthropology and medicine, and began a career as a researcher. He joined the Nazi Party in 1937 and the SS in 1938. He was assigned as a battalion medical officer at the start of World War II, then transferred to the Nazi concentration camps service in early 1943 and assigned to Auschwitz, where he saw the opportunity to conduct genetic research on human subjects. His subsequent experiments focused primarily on twins, with little regard for the health or safety of the victims.[2][3]