On January 20, 1942, Reinhard Heydrich, head of the Reich Security Head Office, convened all secretaries of state of the major German ministries to the Wannsee Conference. This conference is generally held to have been a major turning point, whereby the “final solution of the Jewish question” in Europe by “evacuation” to the East and by other “means” was decided upon. But in fact, the mass extermination of the Jews on an industrial scale, made possible by the creation of death camps, was launched prior to this notorious conference.

He sent one entire Jewish block of 600 women to the gas chamber and cleared the block. He then had it disinfected from top to bottom. Then he put bath tubs between this block and the next, and the women from the next block came out to be disinfected and then transferred to the clean block. Here they were given a clean new nightshirt. The next block was cleaned in this way and so on until all the blocks were disinfected. End of typhus! The awful thing was that he could not put those first 600 somewhere.
From this moment on, the Nazi regime adopted hundreds of laws restricting the rights and liberties of the Jewish people. Jews were expelled from the civil service and barred from entering particular professions, stripped of their citizenship, and forbidden from intermarrying or even having a relationship with anyone of “German or German-related blood”.
Pogroms occurred in several countries occupied by, or supportive of, Germany, attacks that were both encouraged by the Germans and carried out without their involvement.[225] Thousands of Jews were killed in January and June 1941 in the Bucharest pogrom and Iaşi pogrom in Romania, a German ally.[226] According to a 2004 report written by Tuvia Friling and others, up to 14,850 Jews died during the Iaşi pogrom.[227] The Romanian military killed up to 25,000 Jews in Odessa, then under Romanian control, between 18 October 1941 and March 1942, assisted by gendarmes and the police.[228] Mihai Antonescu, Romania's deputy prime minister, is reported as saying it was "the most favorable moment in our history" to solve the "Jewish problem".[229] In July 1941 he said it was time for "total ethnic purification, for a revision of national life, and for purging our race of all those elements which are foreign to its soul, which have grown like mistletoes and darken our future".[230]
The men selected April 15, the darkest night of the month, for the escape. Dogim, the unofficial leader of the group, was first—once he emerged from the tunnel, he would cut a hole in the nearby fence and mark it with a white cloth, so the others would know which direction to run. Farber was second. Motke Zeidel was sixth. The prisoners knew that a group of partisan fighters were holed up nearby, in the Rudnitsky Woods, in a secret camp from which they launched attacks on the Nazi occupiers. “Remember, there is no going back under any circumstances,” Farber reminded his friends. “It is better to die fighting, so just keep moving forward.”
The mass killings of Jews in the occupied Soviet territories were assigned to four SS formations called Einsatzgruppen ("task groups"), which were under Heydrich's overall command. Similar formations had been used to a limited extent in Poland in 1939, but the ones operating in the Soviet territories were much larger.[242] The Einsatzgruppen's commanders were ordinary citizens: the great majority were professionals and most were intellectuals.[243] By the winter of 1941–1942, the four Einsatzgruppen and their helpers had killed almost 500,000 people.[244] The largest massacre of Jews by the mobile killing squads in the Soviet Union was at a ravine called Babi Yar outside Kiev,[245] where 33,771 Jews were killed in a single operation on 29–30 September 1941.[246][n] A mixture of SS and Security Police, assisted by Ukrainian police, carried out the killings.[248] Although they did not actively participate in the killings, men of the German 6th Army helped round up the Jews of Kiev and transport them to be shot.[249] By the end of the war, around two million are thought to have been victims of the Einsatzgruppen and their helpers in the local population and the German Army. Of those, about 1.3 million were Jews and up to a quarter of a million Roma.[250]
 In October 1942, Jan Karski met clandestinely with Jewish leaders at the height of the destruction of Polish Jewry. As a courier for the underground, he delivered their dire message to the Polish government-in-exile in London. “The Jews were abandoned by governments, by church hierarchies, by existing societal structures. But they were not abandoned by all of humanity,” said Karski. “There were thousands upon thousands of people in Europe who risked their life for the Jews. They were priests, nuns, workers, peasants, enlightened ones, simpletons, from all walks of life. They were good people, very simply. We have more good people than probably we think we have in humanity.” Karski was recognized by Yad Vashem as a Righteous Gentile among the Gentiles on June 2, 1982
Over the next two years, Anne wrote faithfully in the diary, which she came to consider a friend, addressing many of the entries to “Dear Kitty.” In the journal and later notebooks, Anne recounted the day-to-day life within the annex. The close quarters and sparse supplies led to various arguments among the inhabitants, and the outgoing Anne came to find the conditions stifling. Heightening tensions was the ever-present concern that they would be discovered. However, many entries involve typical adolescent issues—jealousy toward her sister; annoyance with others, especially her mother; and an increasing sexual awareness. Anne wrote candidly about her developing body, and she experienced a brief romance with Peter van Pels. She also discussed her hopes for the future, which included becoming a journalist or a writer. In addition to the diary, Anne penned several short stories and compiled a list of “beautiful sentences” from other works.
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.

Bartoszewski was a founder of the Polish resistance who organized an underground organization, comprised mostly of Catholics, to help save Jews. He worked to provide false documents to Jews living outside the Warsaw ghetto. In the fall of 1942, he helped found an organization (Council for Aid to Jews) which successfully saved many Jews from the gas chambers. Bartoszweski was actually imprisoned in the Auschwitz Concentration Camp between 1940 and 1941, and after his release was secured by the Red Cross he reported on the camp.
In France Jews under Fascist Italian occupation in the southeast fared better than the Jews of Vichy France, where collaborationist French authorities and police provided essential support to the understaffed German forces. The Jews in those parts of France under direct German occupation fared the worst. Although allied with Germany, the Italians did not participate in the Holocaust until Germany occupied northern Italy after the overthrow of Fascist leader Benito Mussolini in 1943.
According to the drawings done by Walter Dejaco, one of the architects of the Krema II building, the original blueprint showed a corpse slide for rolling bodies down into the vestibule between the two morgues, which were later converted into an undressing room and a gas chamber. The corpse slide was never built. Dejaco was acquitted by a court in Austria in 1972; at his trial, the drawings of the corpse slide were entered as evidence. (The morgue at the Sachsenhausen camp has a corpse slide which can still be seen today.)
Hitler quickly moved to cement his power by suspending many civil liberties and allowing imprisonment without trial. By March, the first Nazi concentration camp was established at Dachau, not to imprison Jews but to hold political dissidents. Further laws targeted Jews, restricting the jobs they could hold and revoking their German citizenship. Anti-Semitic sentiment increased as the Jewish population was blamed for many of Germany's recent and historical problems.

“We had big gaps in our knowledge because most of the documentation about how the genocide was carried out on the ground was captured by the Soviet Red Army and wasn’t available until after the Cold War,” says White. The fall of the Soviet Union led to a feast of wartime bureaucratic records, allowing historians to realize how much leeway Nazi officials were given. It became readily clear that the number of Nazis involved in enacting the Final Solution was much larger than previously believed.
Before the start of World War II, around 9.5 million Jewish people lived in Europe. By the time the war ended, the Nazis had killed 6 million European Jews in concentration camps, or pogroms, or ghettos, or mass executions in what we refer to today as the Holocaust. The Nazis used the term Endlösung, or Final Solution, as the “answer” to the “Jewish question.” But when did this monstrous plan get put in motion?
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]
Some Germans, even some Nazis, dissented from the murder of the Jews and came to their aid. The most famous was Oskar Schindler, a Nazi businessman, who had set up operations using involuntary labour in German-occupied Poland in order to profit from the war. Eventually, he moved to protect his Jewish workers from deportation to extermination camps. In all occupied countries, there were individuals who came to the rescue of Jews, offering a place to hide, some food, or shelter for days or weeks or even for the duration of the war. Most of the rescuers did not see their actions as heroic but felt bound to the Jews by a common sense of humanity. Israel later recognized rescuers with honorary citizenship and commemoration at Yad Vashem, Israel’s memorial to the Holocaust.
Mengele assembled hundreds of pairs of twins and sometimes spent hours measuring various parts of their bodies and taking careful notes. He often injected one twin with mysterious substances and monitored the illness that ensued. He applied painful clamps to children’s limbs to induce gangrene, injected dye into their eyes – which were then shipped back to a pathology lab in Germany – and gave them spinal taps.
…selected by the camp doctor, Josef Mengele, for medical experiments. Auschwitz doctors tested methods of sterilization on the prisoners, using massive doses of radiation, uterine injections, and other barbaric procedures. Experiments involving the killing of twins, upon whom autopsies were performed, were meant to provide information that would supposedly lead…
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]