Himmler ordered the closure of ghettos in Poland in mid-July 1942; most inhabitants were sent to extermination camps. Those Jews needed for war production would be confined in concentration camps.[220] The deportations from the Warsaw Ghetto began on 22 July; over the almost two months of the Aktion, until 12 September, the population was reduced from 350,000 to 65,000. Those deported were transported in freight trains to the Treblinka extermination camp.[221] Similar deportations happened in other ghettos, with many ghettos totally emptied.[222] The first ghetto uprisings occurred in mid-1942 in small community ghettos.[223] Although there were armed resistance attempts in both the larger and smaller ghettos in 1943, in every case they failed against the overwhelming German military force, and the remaining Jews were either killed or deported to the death camps.[224]
The women's concentration camp (Frauenkonzentrationslager or FKL) was established in August 1942, in 15 brick and 15 wooden barracks in sector BIa (Bauabschnitt Ia) in Auschwitz II, when 13,000 women were transferred from Auschwitz I. The camp was later extended into sector BIb, and by October 1943 it held 32,066 women. Conditions in the camp were so poor that, in October 1942, when a group of male prisoners arrived to set up an infirmary, their first task, according to researchers from the Auschwitz museum, was to distinguish the corpses from the women who were still alive.[123] Gisella Perl, a Romanian-Jewish gynecologist and inmate of the women's camp, wrote in 1948:
The Summer Olympics in Berlin gave the Nazis a platform to project a crafted image to the world. Despite calls for boycotts, the games were a success. Anti-Jewish notices were removed and German spectators cheered black athlete Jesse Owens to four gold medals. Visitors saw a tolerant Reich. However, three days after the games ended, the head of the Olympic Village, Wolfgang Fürstner, killed himself as he would soon be dismissed due to his Jewish ancestry under the Nuremberg Laws.
The process of selection and murder was carefully planned and organized. When a train stopped at the platform, veteran prisoners received the victims and gathered their belongings in several barracks in an area known as “Kanada.” The arrivals were lined up in two columns – men and boys in one, women and girls in the other – and SS physicians performed a selection.  The criterion was the appearance of the prisoners, whose fate, for labor or for death, was determined at will. Before they entered the chamber, they were told that they were about to be disinfected and ordered to undress. The doors of the chamber were locked and the gas was introduced. After the victims were murdered, their gold teeth were extracted and women’s hair was shorn by the Sonderkommando – groups of Jews forced to work in the crematoria. The bodies were hauled to the crematorium furnaces for incineration, the bones were pulverized and the ashes were scattered in the fields.

Following Germany's military reforms of the 1920s, Heinz Guderian emerged as a strong proponent of mechanized forces. Within the Inspectorate of Transport Troops, Guderian and colleagues performed theoretical and field exercise work. There was opposition from many officers who gave primacy to the infantry or simply doubted the usefulness of the tank. Among them was Chief of the General Staff Ludwig Beck (1935–38), who skeptical that armored forces could be decisive. Nonetheless, the panzer divisions were established during his tenure.
Blitzkrieg (German: "lightning war") is a method of fast-moving, air-and-land warfare first used extensively during World War II. German armies invading Poland in 1939 used tanks, armored trucks, self-propelled guns, and dive bombers to break through opposing forces and penetrate far behind their lines. During the invasion of the Low Countries and France in 1940, the German armored columns again used these tactics to shock and disorganize the defenders. On the Allied side, U.S. general George S. Patton exhibited (1944) particular skill in mobile warfare in Europe.
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]
Blitzkrieg was not a doctrine, or an operational scheme, or even a tactical system. In fact, it simply doesn’t exist, at least not in the way we usually think it does. The Germans never used the term Blitzkrieg in any precise sense, and almost never used it outside of quotations. It simply meant a rapid and decisive victory (lightning war)... The Germans didn’t invent anything new in the interwar period, but rather used new technologies like tanks and air and radio-controlled command to restore an old way of war that they still found to be valid, Bewegungskrieg.[118]

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.

When the Nazi’s rose to power they built facilities to hold and, eventually kill, their enemies. When the first concentration camps were built in 1933, this primarily meant political dissidents and opponents of the Nazi government, such as German Communists, Socialists, Social Democrats but would grow to include asocial groups – Gypsies, Jehovah’s Witnesses, the homeless, the mentally ill and homosexuals.  It was not until Kristallnacht that the prisoners became primarily Jewish.
At dawn on 10 May, the Germans began an invasion of Belgium and the Netherlands. Accordingly, convinced that they were facing a repeat of the German strategy of 1914, Allied commanders moved the bulk of their forces from the Franco-Belgian border into defensive positions within Belgium to await the continuation of the German attack. In so doing, they fell right into Hitler's trap.
SS officers, including the infamous Dr. Josef Mengele, would conduct selections among these lines, sending most victims to one side and thus condemning them to death in the gas chambers. A minority was sent to the other side, destined for forced labor. Those who were sent to their deaths were killed that same day and their corpses were burnt in the crematoria. Those not sent to the gas chambers were taken to “quarantine,” where their hair was shaved, striped prison uniforms distributed, and registration took place. Prisoners’ individual registration numbers were tattooed onto their left arm.
The first 'bunker', with two sealed rooms, operated from January 1942 to the end of that year. The second, with four air tight rooms, became redundant in the spring of 1943, but remained standing and was used again in the autumn of 1944 when extra 'capacity' was needed for the murder of Hungarian Jews and the liquidation of the ghettos. The second measured about 1.134 square feet. The victims murdered in the 'bunkers' were first obliged to undress in temporary wooden barracks erected nearby. Their bodies were taken out of the gas chambers and pushed to pits where they were burned in the open. Between January 1942 and March 1943, 175,000 Jews were gassed to death here, of whom 105,000 were killed from January to March 1943.
Below are figures for the number of Jews murdered in each country that came under German domination. They are estimates, as are all figures relating to Holocaust victims. The numbers given here for Czechoslovakia, Hungary and Romania are based on their territorial borders before the 1938 Munich agreement. The total number of six million Jews murdered during the Holocaust, which emerged from the Nuremberg trials, is also an estimate. Numbers have ranged between five and seven million killed.
Birkenau was the largest of the more than 40 camps and sub-camps that made up the Auschwitz complex. During its three years of operation, it had a range of functions. When construction began in October 1941, it was supposed to be a camp for 125 thousand prisoners of war. It opened as a branch of Auschwitz in March 1942, and served at the same time as a center for the extermination of the Jews. In its final phase, from 1944, it also became a place where prisoners were concentrated before being transferred to labor in German industry in the depths of the Third Reich.
Eight hundred to a thousand people were crammed into the superimposed compartments of each barracks. Unable to stretch out completely, they slept there both lengthwise and crosswise, with one man's feet on another's head, neck, or chest. Stripped of all human dignity, they pushed and shoved and bit and kicked each other in an effort to get a few more inches' space on which to sleep a little more comfortably. For they did not have long to sleep.[122]
In the aftermath of the Holocaust, many of the survivors found shelter in displaced persons  camps administered by the Allied powers. Between 1948 and 1951, almost 700,000 Jews emigrated to Israel, including 136,000 Jewish displaced persons from Europe. Other Jewish displaced persons emigrated to the United States and other nations. The last camp for Jewish displaced persons closed in 1957.
The Roma refer to the genocide of the Romani people as the Pořajmos.[414] Because they are traditionally a private people with a culture based on oral history, less is known about their experience than that of any other group.[415] Bauer writes that this can be attributed to the Roma's distrust and suspicion, and to their humiliation because some of the taboos in Romani culture regarding hygiene and sex were violated at Auschwitz.[416] In May 1942, the Roma were placed under similar laws to the Jews. On 16 December 1942, Himmler issued a decree that "Gypsy Mischlinge [mixed breeds], Roma Gypsies, and members of the clans of Balkan origins who are not of German blood" should be sent to Auschwitz, unless they had served in the Wehrmacht.[417] He adjusted the order on 15 November 1943; in the occupied Soviet areas, "sedentary Gypsies and part-Gypsies are to be treated as citizens of the country. Nomadic Gypsies and part-Gypsies are to be placed on the same level as Jews and placed in concentration camps."[418] Bauer argues that this adjustment reflected Nazi ideology that the Roma, originally an Aryan population, had been "spoiled" by non-Romani blood.[419]
Blitzkrieg's immediate development began with Germany's defeat in the First World War. Shortly after the war, the new Reichswehr created committees of veteran officers to evaluate 57 issues of the war. The reports of these committees formed doctrinal and training publications which were the standards in the Second World War. The Reichswehr was influenced by its analysis of pre-war German military thought, in particular its infiltration tactics of the war, and the maneuver warfare which dominated the Eastern Front.
Birkenau had its first documentary mention in 795 in the Lorsch Codex as a cell of the Lorsch Abbey. As one of the Abbey’s holdings, it passed into the ownership of the Archbishopric of Mainz in 1232. The centres of Hornbach and Balzenbach, on the other hand, belonged to the Electorate of the Palatinate, meaning that after the Reformation, they belonged to different denominations. In 1532 the town hall was built, and in 1771 the palace, Schloss Birkenau, of the Lords of Wambolt von Umstadt. By 1964, the population had grown to more than 5,000. In 1967 the community was recognized as a recreational resort (Erholungsort) and in 1979 as an open-air resort (Luftkurort). Owing to the only slight tourism, however, it has not reapplied for this designation. In 1995, Birkenau celebrated its 1,200-year jubilee.
The commander of Auschwitz-Birkenau, Rudolf Höss, stated in his autobiography that in 1941 (no exact date is given) he was summoned to Berlin, where Himmler informed him that Hitler had issued an order to solve the “Jewish Question” for good, and that the order was to be implemented by the SS. “The existing extermination places in the east are unsuited to a large scale, long-term action. I have designated Auschwitz for this purpose,” Himmler said.
With the financial backing of several Jewish investors, including one of the owners, Abraham Bankier, Schindler signed an informal lease agreement on the factory on 13 November 1939 and formalised the arrangement on 15 January 1940.[b] He renamed it Deutsche Emailwarenfabrik (German Enamelware Factory) or DEF, and it soon became known by the nickname "Emalia".[25][26] He initially acquired a staff of seven Jewish workers (including Abraham Bankier, who helped him manage the company[27]) and 250 non-Jewish Poles.[28] At its peak in 1944, the business employed around 1,750 workers, a thousand of whom were Jews.[29] Schindler also helped run Schlomo Wiener Ltd, a wholesale outfit that sold his enamelware, and was leaseholder of Prokosziner Glashütte, a glass factory.[30]