SS-Obergruppenführer Reinhard Heydrich, head of the Reich Main Security Office (Reichssicherheitshauptamt or RSHA), convened what became known as the Wannsee Conference on 20 January 1942 at Am Großen Wannsee 56–58, a villa in Berlin's Wannsee suburb. The meeting had been scheduled for 9 December 1941, and invitations had been sent on 29 November, but it had been postponed.
The Nazis brought their own strain of radical ruthlessness to these ideas. They glorified war and saw the uncompromising struggle for survival between nations and races as the engine of human progress. They rejected morality as a Jewish idea, which had corrupted and weakened the German people. They maintained that a great nation such as Germany had the right and duty to build an empire based on the subjugation of 'inferior races'. They looked eastwards to Poland and Russia (where, as it happened, the great majority of European Jews lived) for the territorial expansion of their 'living space' (Lebensraum).
The wounds of the Holocaust–known in Hebrew as Shoah, or catastrophe–were slow to heal. Survivors of the camps found it nearly impossible to return home, as in many cases they had lost their families and been denounced by their non-Jewish neighbors. As a result, the late 1940s saw an unprecedented number of refugees, POWs and other displaced populations moving across Europe.
At the end of July 1944 there were around 7,300 prisoners interned in the Bergen-Belsen camp complex. At the beginning of December 1944, this number had increased to around 15,000, and in February 1945 the number of prisoners was 22,000. As prisoners evacuated from the east continued to arrive, the camp population soared to over 60,000 by April 15, 1945.
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".
The camp physician, Dr. Katz of Nuremberg, was also a prisoner. At first he was well treated because the guards and even the Commander admired his courageous attitude, but after he had witnessed the torture inflicted upon the prisoners, it became dangerous for the Nazis to release him. It was reported later that he had hanged himself in a detention cell—a few days before his anticipated release. His presence in the cell, however, was never explained.
SS Officer Hosler, under arrest, stands in front of a truck which is loaded with corpses at Belsen concentration camp © The Final Solution moved into its last stages as Allied forces began to close in on Germany in 1944. The Project Reinhardt camps were razed. A prisoner work-gang called the Blobel Commando began digging up and burning the bodies of those killed by the Einsatzgruppen. Prisoners remaining in Auschwitz and other concentration camps were transported or force-marched to camps within Germany. Hardly fit for such an effort, thousands of prisoners on these death marches succumbed to starvation, exhaustion and cold, or were shot for not keeping up the pace.
In April 1942, at the same time that the Jews were being sent to the death camps in the East, a new brick building called Baracke X was planned for the Dachau camp. It was designed to house a homicidal gas chamber, disguised as a shower room, and four cremation ovens. The new Baracke X also has four disinfection gas chambers, designed to kill lice in clothing with the use of Zyklon-B, the same poison gas that was used to kill the Jews in the homicidal gas chambers at Majdanek and Auschwitz. The clothing was disinfected in all the Nazi camps in an attempt to prevent typhus which is spread by lice.
In his 1965 essay "Command and Compliance", which originated in his work as an expert witness for the prosecution at the Frankfurt Auschwitz Trials, the German historian Hans Buchheim wrote there was no coercion to murder Jews and others, and all who committed such actions did so out of free will. Buchheim wrote that chances to avoid executing criminal orders "were both more numerous and more real than those concerned are generally prepared to admit", and that he found no evidence that SS men who refused to carry out criminal orders were sent to concentration camps or executed. Moreover, SS rules prohibited acts of gratuitous sadism, as Himmler wished for his men to remain "decent"; acts of sadism were carried out on the initiative of those who were either especially cruel or wished to prove themselves ardent National Socialists. Finally, he argued that those of a non-criminal bent who committed crimes did so because they wished to conform to the values of the group they had joined and were afraid of being branded "weak" by their colleagues if they refused.
In 1935 the Wehrmacht began to build a large military complex close to the village of Belsen, a part of the town of Bergen, in what was then the Province of Hanover. This became the largest military training area in Germany of the time and was used for armoured vehicle training. The barracks were finished in 1937. The camp has been in continuous operation since then and is today known as Bergen-Hohne Training Area. It is used by the NATO armed forces.