In 1939, shortly after the war began, the Germans initiated the T4 Program—framed euphemistically as a “euthanasia” program—for the murder of intellectually or physically disabled and emotionally disturbed Germans who by their very existence violated the Nazi ideal of Aryan supremacy. They were termed “life unworthy of life.” An economic justification was also employed as these Germans were considered “useless eaters.” The Nazis pioneered the use of gas chambers and mass crematoria under this program. The murder of the disabled was the training ground for key personnel who were to later staff the death camps of Aktion Reinhard. The German public protested these murders. The Roman Catholic bishop of Münster, Clemens August, Graf von Galen, preached against them, and the T4 program was formally halted. Nonetheless, the murder and sterilization of these German “Aryans” continued secretly throughout the war.

One of the most remarkable humanitarian acts performed by Oskar and Emilie Schindler involved the case of 120 Jewish male prisoners from Goleszow, a sub-camp of Auschwitz. The men had been working there in a quarry plant that belonged to the SS-operated company “German Earth and Stone Works.”  With the approach of the Russian front in January 1945, they were evacuated from Goleszow and transported westward in sealed cattle-wagons, without food or water. At the end of a seven-day grueling journey in the dead of winter, the SS guards finally stationed the two sealed cattle-cars with their human cargo at the gates of Brunnlitz. Emilie Schindler was just in time to stop the SS camp commandant from sending the train back. Schindler, who had rushed back to the camp from some food-procuring errand outside, barely managed to convince the commandant that he desperately needed the people who were locked in the train for work.

The 15 men present at Wannsee included Adolf Eichmann (head of Jewish affairs for the RSHA and the man who organized the deportation of Jews), Heinrich Müller (head of the Gestapo), and other party leaders and department heads.[256] Thirty copies of the minutes were made. Copy no. 16 was found by American prosecutors in March 1947 in a German Foreign Office folder.[263] Written by Eichmann and stamped "Top Secret", the minutes were written in "euphemistic language" on Heydrich's instructions, according to Eichmann's later testimony.[264] The conference had several purposes. Discussing plans for a "final solution to the Jewish question" ("Endlösung der Judenfrage"), and a "final solution to the Jewish question in Europe" ("Endlösung der europäischen Judenfrage"),[256] it was intended to share information and responsibility, coordinate efforts and policies ("Parallelisierung der Linienführung"), and ensure that authority rested with Heydrich. There was also discussion about whether to include the German Mischlinge (half-Jews).[265] Heydrich told the meeting: "Another possible solution of the problem has now taken the place of emigration, i.e. the evacuation of the Jews to the East, provided that the Fuehrer gives the appropriate approval in advance."[256] He continued:

Perhaps the most famous orchestra to have come out of Birkenau was the women’s orchestra.  Known through Fania Fénelon’s memoirs and the movie Playing for Time, this group — the only all-women SS-sponsored musical organisation established under Nazi internment — was founded in the spring of 1943.  Originally directed by the Polish inmate Zofia Czajkowska, it reached its peak under the guidance of the violin virtuoso and conductor Alma Rosé.  As with other camp bands, the women were required to play at the gates every morning and evening, to accompany the workers’ arrival and departure from the camp.  This job won them the animosity of many prisoners, who remembered returning to their barracks, sick, exhausted, and often carrying or dragging their dead comrades, while
The job was then offered to legendary filmmaker Martin Scorsese, who accepted. Scorsese was set to put the film into production when Spielberg had an epiphany on the set of the revisionist Peter Pan story Hook and realized that he was finally prepared to make Schindler’s List. To make up for the change of heart, Spielberg traded Scorsese the rights to a movie he’d been developing that Scorsese would make into his next film: the remake of Cape Fear.

Not long after acquiring his “Emalia” factory - which produced enamel goods and munitions to supply the German front - the removal of Jews to death camps began in earnest. Schindler's Jewish accountant put him in touch with the few Jews with any remaining wealth. They invested in his factory, and in return they would be able to work there and perhaps be spared. He was persuaded to hire more Jewish workers, designating their skills as “essential,” paying off the Nazis so they would allow them to stay in Kraków. Schindler was making money, but everyone in his factory was fed, no-one was beaten, no-one was killed. It became an oasis of humanity in a desert of moral torpor.
The vital industries and transportation centers that would be targeted for shutdown were valid military targets. Civilians were not to be targeted directly, but the breakdown of production would affect their morale and will to fight. German legal scholars of the 1930s carefully worked out guidelines for what type of bombing was permissible under international law. While direct attacks against civilians were ruled out as "terror bombing", the concept of the attacking the vital war industries – and probable heavy civilian casualties and breakdown of civilian morale – was ruled as acceptable.[138]
From 1933 until 1938, most of the people held in concentration camps were political prisoners and people the Nazis labeled as "asocial." These included the disabled, the homeless, and the mentally ill. After Kristallnacht in 1938, the persecution of Jews became more organized. This led to the exponential increase in the number of Jews sent to concentration camps.
Holocaust, Hebrew Shoʾah (“Catastrophe”), Yiddish and Hebrew Ḥurban (“Destruction”), the systematic state-sponsored killing of six million Jewish men, women, and children and millions of others by Nazi Germany and its collaborators during World War II. The Germans called this “the final solution to the Jewish question.” Yiddish-speaking Jews and survivors in the years immediately following their liberation called the murder of the Jews the Ḥurban, the word used to describe the destruction of the First Temple in Jerusalem by the Babylonians in 586 bce and the destruction of the Second Temple by the Romans in 70 ce. Shoʾah (“Catastrophe”) is the term preferred by Israelis and the French, most especially after Claude Lanzmann’s masterful 1985 motion picture documentary of that title. It is also preferred by people who speak Hebrew and by those who want to be more particular about the Jewish experience or who are uncomfortable with the religious connotations of the word Holocaust. Less universal and more particular, Shoʾah emphasizes the annihilation of the Jews, not the totality of Nazi victims. More particular terms also were used by Raul Hilberg, who called his pioneering work The Destruction of the European Jews, and Lucy S. Dawidowicz, who entitled her book on the Holocaust The War Against the Jews. In part she showed how Germany fought two wars simultaneously: World War II and the racial war against the Jews. The Allies fought only the World War. The word Holocaust is derived from the Greek holokauston, a translation of the Hebrew word ʿolah, meaning a burnt sacrifice offered whole to God. This word was chosen because in the ultimate manifestation of the Nazi killing program—the extermination camps—the bodies of the victims were consumed whole in crematoria and open fires.

^ Nothing appeared in Luftwaffe 'doctrine' stipulating "terror" as a major operational factor. The method of "terror", was denied to German aerial operations (and strategic bombing methods) by the Luftwaffe field manual The Conduct of Air Operations, Regulation 16, issued in 1935 (Corum 1992, pp. 167–169). Regulation 16 denied "terror" operations against civilians, and it was not until 1942 when indiscriminate "terror" operations, in which terror and civilian casualties become the primary target, took place (Corum 1997, pp. 7, 143).
In general, subcamps that produced or processed agricultural goods were administratively subordinate to Auschwitz-Birkenau. Subcamps whose prisoners were deployed at industrial and armaments production or in extractive industries (e.g., coal mining, quarry work) were administratively subordinate to Auschwitz-Monowitz. This division of administrative responsibility was formalized after November 1943.
By Guderian's account he single-handedly created the German tactical and operational methodology. Between 1922 and 1928 Guderian wrote a number of articles concerning military movement. As the ideas of making use of the combustible engine in a protected encasement to bring mobility back to warfare developed in the German army, Guderian was a leading proponent of the formations that would be used for this purpose. He was later asked to write an explanatory book, which was titled Achtung Panzer! (1937). In it he explained the theories of the tank men and defended them.

At Auschwitz alone, more than 2 million people were murdered in a process resembling a large-scale industrial operation. A large population of Jewish and non-Jewish inmates worked in the labor camp there; though only Jews were gassed, thousands of others died of starvation or disease. During the summer of 1944, even as the events of D-Day (June 6, 1944) and a Soviet offensive the same month spelled the beginning of the end for Germany in the war, a large proportion of Hungary’s Jewish population was deported to Auschwitz, and as many as 12,000 Jews were killed every day.
Schindler’s most effective tool in this privately conceived rescue campaign was the privileged status his plant enjoyed as a “business essential to the war effort” as accorded him by the Military Armaments Inspectorate in occupied Poland. This not only qualified him to obtain lucrative military contracts, but also enabled him to draw on Jewish workers who were under the jurisdiction of the SS. When his Jewish employees were threatened with deportation to Auschwitz by the SS, he could claim exemptions for them, arguing that their removal would seriously hamper his efforts to keep up production essential to the war effort. He did not balk at falsifying the records, listing children, housewives, and lawyers as expert mechanics and  metalworkers, and, in general, covering up as much as he could for unqualified or temporarily incapacitated workers.
The orders for the final evacuation and liquidation of the camp were issued in mid-January 1945. The Germans left behind in the main Auschwitz camp, Birkenau and in Monowitz about 7,000 sick or incapacitated who they did not expect would live for long; the rest, approximately 58,000 people, were evacuated by foot into the depths of the Third Reich.
Almost all Jews within areas occupied by the Germans were killed. There were 3,020,000 Jews in the Soviet Union in 1939, and the losses were 1–1.1 million.[400] Around one million Jews were killed by the Einsatzgruppen in the occupied Soviet territories.[401][402] Of Poland's 3.3 million Jews, about 90 percent were killed.[369] Many more died in the ghettos of Poland before they could be deported.[403] The death camps accounted for half the number of Jews killed; 80–90 percent of death-camp victims are estimated to have been Jews.[394] At Auschwitz-Birkenau the Jewish death toll was 1.1 million;[286][404] Treblinka 870,000–925,000;[405] Bełżec 434,000–600,000;[406][287] Chełmno 152,000–320,000;[407][288] Sobibór 170,000–250,000;[408][291] and Majdanek 79,000.[289]
A separate camp for the Roma, the Zigeunerfamilienlager ("Gypsy family camp"), was set up in the BIIe sector of Auschwitz II-Birkenau in February 1943. For unknown reasons, they were not subject to selection and families were allowed to stay together. The first transport of German Roma arrived at Auschwitz II on 26 February that year. There had been a small number of Romani inmates before that; two Czech Romani prisoners, Ignatz and Frank Denhel, tried to escape in December 1942, the latter successfully, and a Polish Romani woman, Stefania Ciuron, arrived on 12 February 1943 and escaped in April.[144]
Schindler moved to West Germany after the war, where he was supported by assistance payments from Jewish relief organisations. After receiving a partial reimbursement for his wartime expenses, he moved with his wife, Emilie, to Argentina, where they took up farming. When he went bankrupt in 1958, Schindler left his wife and returned to Germany, where he failed at several business ventures and relied on financial support from Schindlerjuden ("Schindler Jews")—the people whose lives he had saved during the war. He and his wife, Emilie, were named Righteous Among the Nations by the Israeli government in 1993. He died on 9 October 1974 in Hildesheim, Germany, and was buried in Jerusalem on Mount Zion, the only member of the Nazi Party to be honoured in this way.