Timothy D. Snyder (Bloodlands: Europe Between Hitler and Stalin, 2010): "In this book the term Holocaust signifies the final version of the Final Solution, the German policy to eliminate the Jews of Europe by murdering them. Although Hitler certainly wished to remove the Jews from Europe in a Final Solution earlier, the Holocaust on this definition begins in summer 1941, with the shooting of Jewish women and children in the occupied Soviet Union. The term Holocaust is sometimes used in two other ways: to mean all German killing policies during the war, or to mean all oppression of Jews by the Nazi regime. In this book, Holocaust means the murder of the Jews in Europe, as carried out by the Germans by guns and gas between 1941 and 1945."
Over the 12 years of use as a concentration camp, the Dachau administration recorded the intake of 206,206 prisoners and deaths of 31,951. Crematoria were constructed to dispose of the deceased. Visitors may now walk through the buildings and view the ovens used to cremate bodies, which hid the evidence of many deaths. It is claimed that in 1942, more than 3,166 prisoners in weakened condition were transported to Hartheim Castle near Linz, and were executed by poison gas because they were deemed unfit.:137
The first major camp to be encountered by Allied troops, Majdanek, was discovered by the advancing Soviets on 25 July 1944. Treblinka, Sobibór, and Bełżec were never liberated, but were destroyed by the Germans in 1943. Auschwitz was liberated, also by the Soviets, on 27 January 1945; Buchenwald by the Americans on 11 April; Bergen-Belsen by the British on 15 April; Dachau by the Americans on 29 April; Ravensbrück by the Soviets on 30 April; and Mauthausen by the Americans on 5 May. The Red Cross took control of Theresienstadt on 4 May, days before the Soviets arrived.
While the labour camps at Auschwitz and Majdanek used inmates for slave labour to support the German war effort, the extermination camps at Belzec, Treblinka, and Sobibor had one task alone: killing. At Treblinka a staff of 120, of whom only 30 were SS (the Nazi paramilitary corps), killed some 750,000 to 925,000 Jews during the camp’s 17 months of operation. At Belzec German records detail a staff of 104, including about 20 SS, who killed some 500,000 Jews in less than 10 months. At Sobibor they murdered between 200,000 and 250,000. These camps began operation during the spring and summer of 1942, when the ghettos of German-occupied Poland were filled with Jews. Once they had completed their missions—murder by gassing, or “resettlement in the east,” to use the language of the Wannsee protocols—the Nazis closed the camps. There were six extermination camps, all in German-occupied Poland, among the thousands of concentration and slave-labour camps throughout German-occupied Europe.
The superior race was the "Aryans," the Germans. The word Aryan, "derived from the study of linguistics, which started in the eighteenth century and at some point determined that the Indo-Germanic (also known as Aryan) languages were superior in their structures, variety, and vocabulary to the Semitic languages that had evolved in the Near East. This judgment led to a certain conjecture about the character of the peoples who spoke these languages; the conclusion was that the 'Aryan' peoples were likewise superior to the 'Semitic' ones" (Leni Yahil, The Holocaust: The Fate of European Jewry, New York: Oxford University Press, 1990, p. 36).
Throughout the 1930s, the legal, economic, and social rights of Jews were steadily restricted. On 1 April 1933, there was a boycott of Jewish businesses. On 7 April 1933, the Law for the Restoration of the Professional Civil Service was passed, which excluded Jews and other "non-Aryans" from the civil service. Jews were disbarred from practising law, being editors or proprietors of newspapers, joining the Journalists' Association, or owning farms. In Silesia, in March 1933, a group of men entered the courthouse and beat up Jewish lawyers; Friedländer writes that, in Dresden, Jewish lawyers and judges were dragged out of courtrooms during trials. Jewish students were restricted by quotas from attending schools and universities. Jewish businesses were targeted for closure or "Aryanization", the forcible sale to Germans; of the approximately 50,000 Jewish-owned businesses in Germany in 1933, about 7,000 were still Jewish-owned in April 1939. Works by Jewish composers, authors, and artists were excluded from publications, performances, and exhibitions. Jewish doctors were dismissed or urged to resign. The Deutsches Ärzteblatt (a medical journal) reported on 6 April 1933: "Germans are to be treated by Germans only."