Prisoners transported to these extermination camps were told to undress so they could shower. Rather than a shower, the prisoners were herded into gas chambers and killed. (At Chelmno, the prisoners were herded into gas vans instead of gas chambers.) Auschwitz was the largest concentration and extermination camp built. It is estimated that 1.1 million people were killed at Auschwitz.

Yugoslavia and Greece were invaded in April 1941 and surrendered before the end of the month. Germany and Italy divided Greece into occupation zones but did not eliminate it as a country. Yugoslavia, home to around 80,000 Jews, was dismembered; regions in the north were annexed by Germany and regions along the coast made part of Italy. The rest of the country was divided into the Independent State of Croatia, nominally an ally of Germany, and Serbia, which was governed by a combination of military and police administrators.[167] According to historian Jeremy Black, Serbia was declared free of Jews in August 1942.[168] Croatia's ruling party, the Ustashe, killed the country's Jews, and killed or expelled Orthodox Christian Serbs and Muslims.[167] Jews and Serbs alike were "hacked to death and burned in barns", according to Black. One difference between the Germans and Croatians was that the Ustashe allowed its Jewish and Serbian victims to convert to Catholicism so they could escape death.[168]

Rzepliñski, Andrzej (25 March 2004). "Prosecution of Nazi Crimes in Poland in 1939–2004" (PDF). First International Expert Meeting on War Crimes, Genocide, and Crimes against Humanity. Lyon, France: International Criminal Police Organization – Interpol General Secretariat. Archived from the original (PDF) on 3 March 2016. Retrieved 31 December 2014.
Killing on a mass scale using gas chambers or gas vans was the main difference between the extermination and concentration camps.[269] From the end of 1941, the Germans built six extermination camps in occupied Poland: Auschwitz II-Birkenau, Majdanek, Chełmno, and the three Operation Reinhard camps at Belzec, Sobibor, and Treblinka II.[44][270] Maly Trostenets, a concentration camp in the Reichskommissariat Ostland, became a killing centre in 1942.[44] Gerlach writes that over three million Jews were murdered in 1942, the year that "marked the peak" of the mass murder of Jews.[271] At least 1.4 million of these were in the General Government area of Poland.[272]

The fact that this child survivor had a number on her arm indicates that she had been previously registered at the Auschwitz death camp; only Jews at Auschwitz were tattooed. When the Auschwitz camp was abandoned on January 18, 1945, the survivors, including women and children, were marched 37 miles through two feet of snow to the German border and then sent by train to Bergen-Belsen and other camps.
After invading Poland, the Germans established ghettos in the incorporated territories and General Government to confine Jews.[143] The ghettos were formed and closed off from the outside world at different times and for different reasons.[196][197] For example, the Łódź ghetto was closed in April 1940,[143] to force the Jews inside to give up money and valuables;[198] the Warsaw ghetto was closed for health considerations (for the people outside, not inside, the ghetto),[199] but this did not happen until November 1940;[143] and the Kraków ghetto was not established until March 1941.[200] The Warsaw Ghetto contained 380,000 people[143] and was the largest ghetto in Poland; the Łódź Ghetto was the second largest,[201] holding between 160,000[202] to 223,000.[203] Because of the long drawn-out process of establishing ghettos, it is unlikely that they were originally considered part of a systematic attempt to eliminate Jews completely.[204]

Throughout its history, Dachau was primarily a camp for men; it was used to incarcerate Communists, Social Democrats, trade union leaders, religious dissidents, common criminals, Gypsy men, homosexuals, asocials, spies, resistance fighters, and others who were considered "enemies of the state." It was not a death camp for the genocide of the Jews, although there were Jewish prisoners at Dachau.

The staff consisted of a chief, several assistants and a group of clerks. The office maintained files which contained all personal data pertinent to the allocation of individuals for work of various kinds. The three main sources of employment at Dachau were (a) work inside the camp, (b) work at the SS camp, (c) work in farms and in factories in the area. The lists of people to be shipped off on transports was usually compiled from those prisoners who were not part of a regular "Working Commando."
The German press has repeatedly announced that great numbers of prisoners have been released and that several of the concentration camps have been closed. To illustrate the credibility of such statements, the happenings on Hitler’s birthday are significant. The press declared that two thousand prisoners were released in southern Bavaria, which means that at least fifteen hundred would have to have been released from the Dachau concentration camp. Actually ninety-nine men were released and twenty-five of them were imprisoned again the next day.
During the war, Emilie joined Oskar in Krakow, and by the war’s end, the couple was penniless, having used his fortune to bribe authorities and save his workers. The day after the war ended, Schindler and his wife fled to Argentina with the help of the Schindlerjuden to avoid prosecution for his previous spying activities. For more than a decade, Schindler tried farming, only to declare bankruptcy in 1957. He left his wife and traveled to West Germany, where he made an unsuccessful attempt in the cement business. Schindler spent the rest of his life supported by donations from the Schindlerjuden. He was named a Righteous Gentile by Yad Vashem in 1962, and after his death in 1974, at age 66, Oskar Schindler was interred in the Catholic cemetery on Mount Zion in Jerusalem. In 1993, Steven Spielberg brought the story of Oskar Schindler to the big screen with his film, Schindler's List.

In December 1944 SS-Hauptsturmführer Josef Kramer, previously at Auschwitz-Birkenau, became the new camp commandant, replacing SS-Hauptsturmführer Adolf Haas [de], who had been in post since the spring of 1943.[7] In January 1945, the SS took over the POW hospital and increased the size of Bergen-Belsen. As eastern concentration camps were evacuated before the advance of the Red Army, at least 85,000 people were transported in cattle cars or marched to Bergen-Belsen.[14] Before that the number of prisoners at Belsen had been much smaller. In July 1944 there were 7,300; by December 1944 the number had increased to 15,000; and by February 1945 it had risen to 22,000. Numbers then soared to around 60,000 by April 15, 1945.[7] This overcrowding led to a vast increase in deaths from disease: particularly typhus, as well as tuberculosis, typhoid fever, dysentery and malnutrition in a camp originally designed to hold about 10,000 inmates. At this point also, the special status of the exchange prisoners no longer applied. All inmates were subject to starvation and epidemics.[14]