We might recall (see Part 53) that it was one of Germany’s biggest thinkers of the 19th century—Wilhelm Marr—who coined the term “anti-Semitism.” In so doing he wanted to distinguish hatred of the Jews as members of a religion (anti-Judaism) from hatred of the Jews as members of a race/nation (anti-Semitism). In 1879, he wrote a book called The Victory of Judaism over Germandom, a runaway best-seller; in it Marr warned:
The first major camp to be encountered by Allied troops, Majdanek, was discovered by the advancing Soviets on 25 July 1944.[375] Treblinka, Sobibór, and Bełżec were never liberated, but were destroyed by the Germans in 1943.[376] Auschwitz was liberated, also by the Soviets, on 27 January 1945;[377] Buchenwald by the Americans on 11 April;[378] Bergen-Belsen by the British on 15 April;[379] Dachau by the Americans on 29 April;[380] Ravensbrück by the Soviets on 30 April;[381] and Mauthausen by the Americans on 5 May.[382] The Red Cross took control of Theresienstadt on 4 May, days before the Soviets arrived.[383][384]
The SS: The SS was a military-style group of Nazis, founded in 1925, who were like Hitler's personal bodyguards. They were in charge of overseeing the killing of people in the camps. Part of the SS called the Einsatzgruppen were put in charge of killing many people, before the extermination camps were opened to carry this out on a much greater scale. The SS also took control of intelligence, security and the police force.

Rooted in 19th-century antisemitic discourse on the "Jewish question," "Final Solution" as a Nazi cover term denotes the last stage in the evolution of the Third Reich's anti-Jewish policies from persecution to physical annihilation on a European scale. Currently, Final Solution is used interchangeably with other, broader terms that refer to German extermination policies during World War II, as well as more specifically to describe German intent and the decision-making process leading up to the beginning of systematic mass murder.

This was more than an exaggerated adolescent flourish. She had already intuited what greatness in literature might mean, and she clearly sensed the force of what lay under her hand in the pages of her diary: a conscious literary record of frightened lives in daily peril; an explosive document aimed directly at the future. In her last months, she was assiduously polishing phrases and editing passages with an eye to postwar publication. Het Achterhuis, as she called her manuscript, in Dutch—“the house behind,” often translated as “the secret annex”—was hardly intended to be Anne Frank’s last word; it was conceived as the forerunner work of a professional woman of letters.
The Nazis established ghettos in occupied Poland. Polish and western European Jews were deported to these ghettos. During the German invasion of the Soviet Union in 1941, mobile killing squads (Einsatzgruppen) began killing entire Jewish communities. The methods used, mainly shooting or gas vans, were soon regarded as inefficient and as a psychological burden on the killers.
Before the war, Mengele had received doctorates in anthropology and medicine, and began a career as a researcher. He joined the Nazi Party in 1937 and the SS in 1938. He was assigned as a battalion medical officer at the start of World War II, then transferred to the Nazi concentration camps service in early 1943 and assigned to Auschwitz, where he saw the opportunity to conduct genetic research on human subjects. His subsequent experiments focused primarily on twins, with little regard for the health or safety of the victims.[2][3]