SS-Obergruppenführer Reinhard Heydrich, head of the Reich Main Security Office (Reichssicherheitshauptamt or RSHA), convened what became known as the Wannsee Conference on 20 January 1942 at Am Großen Wannsee 56–58, a villa in Berlin's Wannsee suburb.[256][257] The meeting had been scheduled for 9 December 1941, and invitations had been sent on 29 November, but it had been postponed.[258]

Les enceintes, les barbelés, les miradors, les baraquements, les potences, les chambres à gaz et les fours crématoires de l'ancien camp de concentration et d'extermination d'Auschwitz-Birkenau, le plus vaste du IIIe Reich, attestent les conditions dans lesquelles fonctionnait le génocide hitlérien. Selon des recherches historiques, 1,1 à 1,5 million de personnes – dont de très nombreux Juifs – furent systématiquement affamées, torturées et assassinées dans ce camp, symbole de la cruauté de l'homme pour l'homme au XXe siècle.

The soldiers also found warehouses containing 836,525 items of women clothing, 348,820 items of men clothing, 43,525 pairs of shoes and vast numbers of toothbrushes, glasses and other personal effects. They found also 460 artificial limbs and seven tons of human hair shaved from Jews before they were murdered. The human hairs were used by the company “Alex Zink” (located in Bavaria) for confection of cloth. This company was paying the Nazi’s 50 pfennig per kilo of human hair.
The courtyard between blocks 10 and 11, known as the "death wall" served as an execution area for Poles not in Auschwitz who had been sentenced to death by a criminal court—presided over by German judges—including for petty crimes such as stealing food.[138] Several rooms in block 11 were deemed the Polizei-Ersatz-Gefängnis Myslowitz in Auschwitz ("Alternative jail of the police station at Mysłowice").[139] There were also Sonderbehandlung cases ("special treatment") for Poles and others regarded as dangerous to the Third Reich.[140] Members of the camp resistance were shot there, as were 200 of the Sonderkommandos who took part in the Sonderkommando revolt in October 1944.[141] Thousands of Poles were executed at the death wall; Höss wrote that "execution orders arrived in an unbroken stream".[142]
As Nazi tyranny spread across Europe, the Germans and their collaborators persecuted and murdered millions of other people. Between two and three million Soviet prisoners of war were murdered or died of starvation, disease, neglect, or brutal treatment. The Germans targeted the non-Jewish Polish intelligentsia for killing, and deported millions of Polish and Soviet civilians for forced labor in Germany or in occupied Poland, where these individuals worked and often died under deplorable conditions.
The concentration and death-camp complex at Auschwitz-Birkenau was the largest killing center in the entire Nazi universe; the very heart of their system. Of the many sub-camps affiliated with Auschwitz, Birkenau, or Auschwitz II, was by far the largest. The main camp, Auschwitz I was on the outskirts of the Polish city Oswiecim. Birkenau was in a suiburb named Zasole.
As the calibre of the orchestra improved under the baton of Laks, the SS began to make more frequent and diverse requests of the musicians.  On Sundays they were forced to give concerts of ‘light’ music, and they expanded their repertoire to include excerpts from operas and operettas.  They were also frequently given special requests by various guards.  They composed special musical medleys in honour of SS officials' birthdays.  Some Nazis regularly attended rehearsals, playing music with the musicians, and even on occasion befriending them.  Members of the orchestra were also frequently commanded to entertain at late-night parties for camp VIPs and the guards. 
Never one to miss a chance to make money, he marched into Poland on the heels of the SS. He dived headfirst into the black-market and the underworld and soon made friends with the local Gestapo bigwigs, softening them up with women, money and illicit booze. His newfound connections helped him acquire a factory which he ran with the cheapest labor around: Jewish.
Tested by the Germans during the Spanish Civil War in 1938 and against Poland in 1939, the blitzkrieg proved to be a formidable combination of land and air action. Germany’s success with the tactic at the beginning of World War II hinged largely on the fact that it was the only country that had effectively linked its combined forces with radio communications. The use of mobility, shock, and locally concentrated firepower in a skillfully coordinated attack paralyzed an adversary’s capacity to organize defenses, rather than attempting to physically overcome them, and then exploited that paralysis by penetrating to the adversary’s rear areas and disrupting its whole system of communications and administration. The tactics, as employed by the Germans, consisted of a splitting thrust on a narrow front by combat groups using tanks, dive bombers, and motorized artillery to disrupt the main enemy battle position at the Schwerpunkt. Wide sweeps by armoured vehicles followed, establishing the Kessel that trapped and immobilized enemy forces. Those tactics were remarkably economical of both lives and matériel, primarily for the attackers but also, because of the speed and short duration of the campaign, among the victims.

These evacuations were regarded as provisional or "temporary solutions" ("Ausweichmöglichkeiten").[266][p] The final solution would encompass the 11 million Jews living not only in territories controlled by Germany, but elsewhere in Europe and adjacent territories, such as Britain, Ireland, Switzerland, Turkey, Sweden, Portugal, Spain, and Hungary, "dependent on military developments".[266] There was little doubt what the final solution was, writes Peter Longerich: "the Jews were to be annihilated by a combination of forced labour and mass murder".[268]
The roots of Hitler’s particularly virulent brand of anti-Semitism are unclear. Born in Austria in 1889, he served in the German army during World War I. Like many anti-Semites in Germany, he blamed the Jews for the country’s defeat in 1918. Soon after the war ended, Hitler joined the National German Workers’ Party, which became the National Socialist German Workers’ Party (NSDAP), known to English speakers as the Nazis. While imprisoned for treason for his role in the Beer Hall Putsch of 1923, Hitler wrote the memoir and propaganda tract “Mein Kampf”(My Struggle), in which he predicted a general European war that would result in “the extermination of the Jewish race in Germany.”
Half of the German divisions available in 1940 were combat ready but less well-equipped than the British and French or the Imperial German Army of 1914. In the spring of 1940, the German army was semi-modern, in which a small number of well-equipped and "elite" divisions were offset by many second and third rate divisions".[135] In 2003, John Mosier wrote that while the French soldiers in 1940 were better trained than German soldiers, as were the Americans later and that the German army was the least mechanised of the major armies, its leadership cadres were larger and better and that the high standard of leadership was the main reason for the successes of the German army in World War II, as it had been in World War I.[136]

Methods of mass murder evolved at local levels as well as being decreed from Nazi high command. Killing squads rounded up and shot entire Jewish communities. Over two days in Kiev, 33,771 Jews were shot. The murder of Jews rapidly escalated, in part because local Nazi leaders didn’t have enough room to place them in the ghettos. By the end of the year, plans to implement the systematic slaughter of Jews by using gas in mobile trucks and gas chambers were well underway.
The Reichswehr and Red Army collaborated in wargames and tests in Kazan and Lipetsk beginning in 1926. During this period, the Red Army was developing the theory of Deep operations, which would guide Red Army doctrine throughout World War II. Set within the Soviet Union, these two centers were used to field test aircraft and armored vehicles up to the battalion level, as well as housing aerial and armored warfare schools through which officers were rotated. This was done in the Soviet Union, in secret, to evade the Treaty of Versailles's occupational agent, the Inter-Allied Commission.
Such a stalemate is not unique to armed conflict. Businesses can find themselves in similar situations when the status quo is preserved through a lack of innovation that seems to plague all competitors. It’s very hard to spot this situation in the consumer tech industry, but it happens a lot in heavily regulated industries like healthcare and education. If we were to teleport people from just ten years ago to the present day, they would hardly recognize all the tech companies and applications that dominate the news headlines (Snapchat, Instagram, Android or Tesla, either didn’t exist or were in their infancies ten years ago), whereas they would feel right at home in a school or a hospital. Let’s go back to the Germans ….
Around Birkenau are several nature conservation areas and a considerable number of hiking paths. These are found on the one hand in the woods around Birkenau, but on the other hand, the Höhenweg (“Height Way”, European walking route E1, plateau path between Birkenau and Reisen), for example, is also worth visiting, as there is a striking view over Birkenau and Nieder-Liebersbach.
The gas chambers worked to their fullest capacity from April to July 1944, during the massacre of Hungary's Jews. Hungary was an ally of Germany during the war, but it had resisted turning over its Jews until Germany invaded that March.[177] A rail spur leading to crematoria II and III in Auschwitz II was completed that May, and a new ramp was built between sectors BI and BII to deliver the victims closer to the gas chambers.[178] On 29 April the first 1,800 Hungarian Jews arrived at the camp;[178] from 14 May until early July 1944, 437,000 Hungarian Jews, half the pre-war population, were deported to Auschwitz, at a rate of 12,000 a day for a considerable part of that period.[105] The crematoria had to be overhauled. Crematoria II and III were given new elevators leading from the stoves to the gas chambers, new grates were fitted, and several of the dressing rooms and gas chambers were painted. Cremation pits were dug behind crematorium V.[178] The last mass transports to arrive in Auschwitz were 60,000–70,000 Jews from the Łódź Ghetto, some 2,000 from Theresienstadt, and 8,000 from Slovakia.[166][179] The last selection took place on 30 October 1944.[162] Crematorium IV was demolished after the Sonderkommando revolt on 7 October 1944. The SS blew up crematorium V on 14 January 1945, and crematoria II and III on 20 January.[180]

Reading the comments below, it is interesting to see how little people know about history and what actually happened during WW2. Is the education system so bad in America that one person doesn't know that Poland was invaded in 1939 by the Nazi - pick up a book! The lesson of Auschwitz should be learnt, but once should also realise that it wasn't just the Jews who were murdered. There were gypsies, native poles, political opponents, homosexuals to name but a few who were exterminated in the gas chambers or worked to death. By studying and learning from the past can we help avoid these situations again. However in this climate I sometimes wonder if anything has been learnt.
Dan Stone, a specialist in the historiography of the Holocaust, lists ethnic Poles, Ukrainians, Soviet prisoners of war, Jehovah's Witnesses, black Germans, and homosexuals as among the groups persecuted by the Nazis; he writes that the occupation of eastern Europe can also be viewed as genocidal. But the German attitude toward the Jews was different in kind, he argues. The Nazis regarded the Jews not as racially inferior, deviant, or enemy nationals, as they did other groups, but as a "Gegenrasse: a 'counter-race', that is to say, not really human at all". The Holocaust, for Stone, is therefore defined as the genocide of the Jews, although he argues that it cannot be "properly historically situated without understanding the 'Nazi empire' with its grandiose demographic plans".[d] Donald Niewyk and Francis Nicosia, in The Columbia Guide to the Holocaust (2000), favour a definition that focuses on the Jews, Roma, and Aktion T4 victims: "The Holocaust—that is, Nazi genocide—was the systematic, state-sponsored murder of entire groups determined by heredity. This applied to Jews, Gypsies, and the handicapped."[33]
Guderian argued that the tank was the decisive weapon of war. "If the tanks succeed, then victory follows", he wrote. In an article addressed to critics of tank warfare, he wrote "until our critics can produce some new and better method of making a successful land attack other than self-massacre, we shall continue to maintain our beliefs that tanks—properly employed, needless to say—are today the best means available for land attack." Addressing the faster rate at which defenders could reinforce an area than attackers could penetrate it during the First World War, Guderian wrote that "since reserve forces will now be motorized, the building up of new defensive fronts is easier than it used to be; the chances of an offensive based on the timetable of artillery and infantry co-operation are, as a result, even slighter today than they were in the last war." He continued, "We believe that by attacking with tanks we can achieve a higher rate of movement than has been hitherto obtainable, and—what is perhaps even more important—that we can keep moving once a breakthrough has been made." Guderian additionally required that tactical radios be widely used to facilitate co-ordination and command.

Oscar Schindler rose to the highest level of humanity, walked through the bloody mud of the Holocaust without soiling his soul, his compassion, his respect for human life -  and gave his Jews a second chance at life. He miraculously managed to do it and pulled it off by using the very same talents that made him a war profiteer - his flair for presentation, bribery, and grand gestures.
Before beginning Jewish exterminations, though, the Nazi’s used the Soviet POWs at the Auschwitz camp in trials of the poison gas Zyklon-B, produced by the German company “Degesch” (Deutsche Gesellschaft zur Schädlingsbekämpfung), which was marked as the best way to kill many people at once. The POWs were gassed in underground cells in Block 11, the so called “Death Block,” and following these trials, one gas chamber was setup just outside the main camp and two temporary gas chambers were opened at Birkenau.
There was initially little to distinguish Schindler from the other businessmen who cooperated with the Nazis, until the liquidation of the Kraków ghetto threatened the workers he relied on. As the war dragged on and Schindler began to build personal relationships with his workers, he underwent a personal transformation. Over time, Schindler became less concerned with making a profit; soon he was spending enormous sums of money to keep his workers safe.
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The influence of air forces over forces on the ground changed significantly over the course of the Second World War. Early German successes were conducted when Allied aircraft could not make a significant impact on the battlefield. In May 1940, there was near parity in numbers of aircraft between the Luftwaffe and the Allies, but the Luftwaffe had been developed to support Germany's ground forces, had liaison officers with the mobile formations, and operated a higher number of sorties per aircraft.[71] In addition, German air parity or superiority allowed the unencumbered movement of ground forces, their unhindered assembly into concentrated attack formations, aerial reconnaissance, aerial resupply of fast moving formations and close air support at the point of attack.[citation needed] The Allied air forces had no close air support aircraft, training or doctrine.[71] The Allies flew 434 French and 160 British sorties a day but methods of attacking ground targets had yet to be developed; therefore Allied aircraft caused negligible damage. Against these 600 sorties the Luftwaffe on average flew 1,500 sorties a day.[72] On May 13, Fliegerkorps VIII flew 1,000 sorties in support of the crossing of the Meuse. The following day the Allies made repeated attempts to destroy the German pontoon bridges, but German fighter aircraft, ground fire and Luftwaffe flak batteries with the panzer forces destroyed 56 percent of the attacking Allied aircraft while the bridges remained intact.[73]
In 1944, Josiah DuBois, Jr. wrote a memorandum to then-Secretary of the Treasury Henry Morgenthau, Jr. entitled “Report to the Secretary on the Acquiescence of This Government in the Murder of the Jews”, which condemned the bureaucratic interference of U.S. State Department policies in obstructing the evacuation of Holocaust Refugees from Romania and Occupied France. The Report would spur the Roosevelt administration to create the War Refugee Board later that year.

When Hitler came to power legally on January 30, 1933, as the head of a coalition government, his first objective was to consolidate power and to eliminate political opposition. The assault against the Jews began on April 1 with a boycott of Jewish businesses. A week later the Nazis dismissed Jews from the civil service, and by the end of the month the participation of Jews in German schools was restricted by a quota. On May 10 thousands of Nazi students, together with many professors, stormed university libraries and bookstores in 30 cities throughout Germany to remove tens of thousands of books written by non-Aryans and those opposed to Nazi ideology. The books were tossed into bonfires in an effort to cleanse German culture of “un-Germanic” writings. A century earlier Heinrich Heine—a German poet of Jewish origin—had said, “Where one burns books, one will, in the end, burn people.” In Nazi Germany the time between the burning of Jewish books and the burning of Jews was eight years.
Schindler first arrived in Kraków in October 1939, on Abwehr business, and took an apartment the following month. Emilie maintained the apartment in Ostrava and visited Oskar in Kraków at least once a week.[18][19] In November 1939, he contacted interior decorator Mila Pfefferberg to decorate his new apartment. Her son, Leopold "Poldek" Pfefferberg, soon became one of his contacts for black market trading. They eventually became lifelong friends.[20]