The Nazis introduced a racial hierarchy—keeping Poles in harsh conditions, while favoring German priests.:148 697 Poles arrived in December 1941, and a further 500 of mainly elderly clergy were brought in October the following year. Inadequately clothed for the bitter cold, of this group only 82 survived. A large number of Polish priests were chosen for Nazi medical experiments. In November 1942, 20 were given phlegmons. 120 were used by Dr Schilling for malaria experiments between July 1942 and May 1944. Several Poles met their deaths with the "invalid trains" sent out from the camp, others were liquidated in the camp and given bogus death certificates. Some died of cruel punishment for misdemeanors—beaten to death or run to exhaustion.:148–9
In 1980, Australian author Thomas Keneally by chance visited Pfefferberg's luggage store in Beverly Hills while en route home from a film festival in Europe. Pfefferberg took the opportunity to tell Keneally the story of Oskar Schindler. He gave him copies of some materials he had on file, and Keneally soon decided to make a fictionalised treatment of the story. After extensive research and interviews with surviving Schindlerjuden, his 1982 historical novel Schindler's Ark (published in the United States as Schindler's List) was the result.
Beginning in late 1941, the Germans began mass transports from the ghettoes in Poland to the concentration camps, starting with those people viewed as the least useful: the sick, old and weak and the very young. The first mass gassings began at the camp of Belzec, near Lublin, on March 17, 1942. Five more mass killing centers were built at camps in occupied Poland, including Chelmno, Sobibor, Treblinka, Majdanek and the largest of all, Auschwitz-Birkenau. From 1942 to 1945, Jews were deported to the camps from all over Europe, including German-controlled territory as well as those countries allied with Germany. The heaviest deportations took place during the summer and fall of 1942, when more than 300,000 people were deported from the Warsaw ghetto alone.
The American Military Tribunal proceeding against the Waffen-SS soldiers who were accused of shooting American POWs at Malmédy was also held at Dachau, as were the proceedings against the accused guards and staff at the Buchenwald, Mauthausen, Flossenbürg and Nordhausen concentration camps. The proceedings against the infamous Ilse Koch, dubbed the "Bitch of Buchenwald" by the press, also took place in Dachau. As the wife of the Commandant at Buchenwald, she was accused of selecting tattooed prisoners to be killed by her alleged lover, Dr. Waldemar Hoven, so that their skin could be made into human lamp shades to decorate her home.
In January 1941, Dachau was designated a Class I camp and Buchenwald became a Class II camp; Mauthausen and Gusen in Austria were the only Class III camps in the Nazi system. The Class I designation meant that treatment of the inmates was less harsh and that prisoners had a better chance of being released. Dachau was the best of the Nazis camps, as far as the treatment of the prisoners was concerned.
Behind the furnace was the execution chamber, a windowless cell twenty feet square with gas nozzles every few feet across the ceiling. Outside, in addition to the huge mound of charred bone fragments, were the carefully sorted and stacked clothes of the victims - which obviously numbered in the thousands. Although I stood there looking at it, I couldn't believe it. The realness of the whole mess is just gradually dawning on me, and I doubt if it will ever on you.
In October 1939 Hitler signed a "euthanasia decree" backdated to 1 September 1939 that authorized Reichsleiter Philipp Bouhler, the chief of Hitler's Chancellery, and Karl Brandt, Hitler's personal physician, to carry out a program of involuntary "euthanasia"; after the war this program was named Aktion T4. It was named after Tiergartenstraße 4, the address of a villa in the Berlin borough of Tiergarten, where the various organizations involved were headquartered. T4 was mainly directed at adults, but the "euthanasia" of children was also carried out. Between 1939 and 1941, 80,000 to 100,000 mentally ill adults in institutions were killed, as were 5,000 children and 1,000 Jews, also in institutions. In addition there were specialized killing centres, where the deaths were estimated at 20,000, according to Georg Renno, the deputy director of Schloss Hartheim, one of the "euthanasia" centers, or 400,000, according to Frank Zeireis, the commandant of the Mauthausen concentration camp. Overall, the number of mentally and physically handicapped murdered was about 150,000.
Sprawozdanie 6/42 was sent to Polish officials in London by courier and had reached them by 12 November 1942, when it was translated into English and added to another report, "Report on Conditions in Poland". Dated 27 November, this was forwarded to the Polish Embassy in the United States. On 10 December 1942, the Polish Foreign Affairs Minister, Edward Raczyński, addressed the fledgling United Nations on the killings; the address was distributed with the title The Mass Extermination of Jews in German Occupied Poland. He told them about the use of poison gas; about Treblinka, Bełżec and Sobibor; that the Polish underground had referred to them as extermination camps; and that tens of thousands of Jews had been killed in Bełżec in March and April 1942. One in three Jews in Poland were already dead, he estimated, from a population of 3,130,000. Raczyński's address was covered by the New York Times and The Times of London. Winston Churchill received it, and Anthony Eden presented it to the British cabinet. On 17 December 1942, 11 Allies issued the Joint Declaration by Members of the United Nations condemning the "bestial policy of cold-blooded extermination".
In the last months of the war, the conditions at Dachau became even worse. As Allied forces advanced toward Germany, the Germans began to move prisoners in concentration camps near the front to more centrally located camps. They hoped to prevent the liberation of large numbers of prisoners. Transports from the evacuated camps arrived continuously at Dachau. After days of travel with little or no food or water, the prisoners arrived weak and exhausted, often near death. Typhus epidemics became a serious problem as a result of overcrowding, poor sanitary conditions, insufficient provisions, and the weakened state of the prisoners.
After the joint conquest of Poland, by Germany and the Soviet Union, in September 1939, numerous Polish resistance fighters were imprisoned, including 1,780 Catholic priests. When the Catholic Church complained about the harsh treatment the priests received in the concentration camps, all the priests were moved to Dachau because it was the mildest camp of all. Dachau was designated as the main camp for Catholic priests who had been arrested on various charges, including child molestation, and a total of 2,720 from 19 different nations were sent there. The priests did not have to work in the factories and were given special privileges.
Following the invasion of the Soviet Union in June 1941, Einsatzgruppen and, later, militarized battalions of Order Police officials, moved behind German lines to carry out mass-murder operations against Jews, Roma, and Soviet state and Communist Party officials. German SS and police units, supported by units of the Wehrmacht and the Waffen SS, murdered more than a million Jewish men, women, and children, and hundreds of thousands of others.
In August 1944, a new section was created and this became the so-called "women's camp". By November 1944 this camp received around 9,000 women and young girls. Most of those who were able to work stayed only for a short while and were then sent on to other concentration camps or slave-labour camps. The first women interned there were Poles, arrested after the failed Warsaw Uprising. Others were Jewish women from Poland or Hungary, transferred from Auschwitz. Among those who never left Bergen-Belsen were Margot and Anne Frank, who died there in February or March 1945.