From 1942, members of the Bureau of Information and Propaganda of the Warsaw-area Home Army published reports based on the accounts of escapees. The first was a fictional memoir, "Oświęcim. Pamiętnik więźnia" ("Auschwitz: Diary of a prisoner") by Halina Krahelska, published in April 1942 in Warsaw.[205] Also published in 1942 was the pamphlet Obóz śmierci (Camp of Death) by Natalia Zarembina,[206] and W piekle (In Hell) by Zofia Kossak-Szczucka, founder of Żegota.[207] In March 1944, the Polish Labor Group in New York published a report in English, "Oswiecim, Camp of Death (Underground Report)", with a foreword by Florence Jaffray Harriman, which described the gassing of prisoners from 1942.[208]
Schwerpunktprinzip was a heuristic device (conceptual tool or thinking formula) used in the German army since the nineteenth century, to make decisions from tactics to strategy about priority. Schwerpunkt has been translated as centre of gravity, crucial, focal point and point of main effort. None of these forms is sufficient to describe the universal importance of the term and the concept of Schwerpunktprinzip. Every unit in the army, from the company to the supreme command, decided on a Schwerpunkt through schwerpunktbildung, as did the support services, which meant that commanders always knew what was most important and why. The German army was trained to support the Schwerpunkt, even when risks had to be taken elsewhere to support the point of main effort.[61] Through Schwerpunktbildung, the German army could achieve superiority at the Schwerpunkt, whether attacking or defending, to turn local success at the Schwerpunkt into the progressive disorganisation of the opposing force, creating more opportunities to exploit this advantage, even if numerically and strategically inferior in general. In the 1930s, Guderian summarised this as "Klotzen, nicht kleckern!" ("Kick, don't spatter them!").[62][63]
Heinz Guderian is widely regarded as being highly influential in developing the military methods of warfare used by Germany's tank men at the start of the Second World War. This style of warfare brought manoeuvre back to the fore, and placed an emphasis on the offensive. This style, along with the shockingly rapid collapse in the armies that opposed it, came to be branded as blitzkrieg warfare.[15]
The understanding of operations in Poland has shifted considerably since the Second World War. Many early postwar histories incorrectly attribute German victory to "enormous development in military technique which occurred between 1918 and 1940", incorrectly citing that "Germany, who translated (British inter-war) theories into action...called the result Blitzkrieg." More recent histories identify German operations in Poland as relatively cautious and traditional. Matthew Cooper wrote that

This was so awful! How can ANYONE disregard this as DUMB?!? Who the hell ARE you ppl to think of this that way? You weren't there...don't judge it...this is a place of evil and murder. Millions of innocent ppl killed everyday for YEARS!! Anyone who thinks this camp is not worth hearing about..seriously has no LIFE! No HEART! would be considered lowlife..heartless could you... To all who actually CARE about what happened...thank you. We will never forget.....
Although not ordered to take part, psychiatrists and many psychiatric institutions were involved in the planning and carrying out of Aktion T4 at every stage.[103] After protests from the German Catholic and Protestant churches, Hitler ordered the cancellation of the T4 program in August 1941,[104] although the disabled and mentally ill continued to be killed until the end of the war.[102] The medical community regularly received bodies and body parts for research. Eberhard Karl University received 1,077 bodies from executions between 1933 and 1945. The neuroscientist Julius Hallervorden received 697 brains from one hospital between 1940 and 1944: "I accepted these brains of course. Where they came from and how they came to me was really none of my business."[105]
After the Nuremberg war crimes trials finished, the United States spearheaded the effort to end genocide and become a champion for the prevention of crimes against humanity. The U.S. pushed for greater international effort, helping to draft the 1948 Genocide Convention. President Harry Truman addressed Congress urging the Convention’s passage. He stressed the role the United States had to play in “outlawing the world-shocking crime of genocide.”
The political situation in Germany and elsewhere in Europe after World War I (1914–1918) contributed to the rise of virulent antisemitism. Many Germans did not accept that their country had been defeated, which gave birth to the stab-in-the-back myth. This insinuated that it was disloyal politicians, chiefly Jews and communists, who had orchestrated Germany's surrender. Inflaming the anti-Jewish sentiment was the apparent over-representation of Jews in the leadership of communist revolutionary governments in Europe, such as Ernst Toller, head of a short-lived revolutionary government in Bavaria. This perception contributed to the canard of Jewish Bolshevism.[65]
In 1983, French scholar George Wellers was one of the first to use German data on deportations; he arrived at a figure of 1,471,595 deaths, including 1.35 million Jews and 86,675 Poles.[190] A larger study in the late 1980s by Franciszek Piper, published by Yad Vashem in 1991,[191] used timetables of train arrivals combined with deportation records to calculate that, of the 1.3 million deported to the camp, 1,082,000 died there between 1940 and 1945, a figure (rounded up to 1.1 million) that he regarded as a minimum[192] and that came to be widely accepted.[e]

His middle-class Catholic family belonged to the German-speaking community in the Sudetenland. The young Schindler, who attended German grammar school and studied engineering, was expected to follow in the footsteps of his father and  take charge of the family farm-machinery plant. Some of Schindler’s schoolmates and childhood neighbors were Jews, but with none of them did he develop an intimate or lasting friendship. Like most of the German-speaking youths of the Sudetenland, he subscribed to Konrad Henlein’s Sudeten German Party, which strongly supported the Nazi Germany and actively strove for the dismemberment of Czechoslovakia and their annexation to Germany . When the Sudetenland was incorporated into Nazi Germany in 1938, Schindler became a formal member of the Nazi party.
When we think of the crimes of Nazi doctors, what comes to mind are their cruel and sometimes fatal experiments… Yet when we turn to the Nazi doctors’ role in Auschwitz, it was not the experiments that were most significant. Rather, it was his participation in the killing process—indeed his supervision of Auschwitz mass murder from beginning to end. 1
After attending primary and secondary school, Schindler enrolled in a technical school, from which he was expelled in 1924 for forging his report card. He later graduated, but did not take the Abitur exams that would have enabled him to go to college or university. Instead, he took courses in Brno in several trades, including chauffeuring and machinery, and worked for his father for three years. A fan of motorcycles since his youth, Schindler bought a 250-cc Moto Guzzi racing motorcycle and competed recreationally in mountain races for the next few years.[1]