"Dr. Mengele had always been more interested in Tibi. I am not sure why - perhaps because he was the older twin. Mengele made several operations on Tibi. One surgery on his spine left my brother paralyzed. He could not walk anymore. Then they took out his sexual organs. After the fourth operation, I did not see Tibi anymore. I cannot tell you how I felt. It is impossible to put into words how I felt. They had taken away my father, my mother, my two older brothers - and now, my twin ..."
In 2016, the Anne Frank House published new research pointing to investigation over ration card fraud, rather than betrayal, as a plausible explanation for the raid that led to the arrest of the Franks. The report states that other activities in the building may have led authorities there, including activities of Frank's company. However, it does not rule out betrayal.
In Nazi Germany, the idea of creating a master race resulted in efforts to "purify" the Deutsche Volk through eugenics and its culmination was the compulsory sterilization or the involuntary euthanasia of physically or mentally disabled people. After World War II, the euthanasia programme was named Action T4. The ideological justification for euthanasia was Hitler's view of Sparta (11th century – 195 BC) as the original Völkisch state and he praised Sparta's dispassionate destruction of congenitally deformed infants in order to maintain racial purity. Some non-Aryans enlisted in Nazi organisations like the Hitler Youth and the Wehrmacht, including Germans of African descent and Jewish descent. The Nazis began to implement "racial hygiene" policies as soon as they came to power. The July 1933 "Law for the Prevention of Hereditarily Diseased Offspring" prescribed compulsory sterilization for people with a range of conditions which were thought to be hereditary, such as schizophrenia, epilepsy, Huntington's chorea and "imbecility". Sterilization was also mandated for chronic alcoholism and other forms of social deviance. An estimated 360,000 people were sterilised under this law between 1933 and 1939. Although some Nazis suggested that the programme should be extended to people with physical disabilities, such ideas had to be expressed carefully, given the fact that some Nazis had physical disabilities, one example being one of the most powerful figures of the regime, Joseph Goebbels, who had a deformed right leg.
Jewish deportees arriving at Auschwitz-Birkenau immediately underwent selection. The SS staff chose some of the able-bodied for forced labor and sent the rest directly to the gas chambers, which were disguised as shower installations to mislead the victims. The belongings of all deportees were confiscated and sorted in the "Kanada" (Canada) warehouse for shipment back to Germany. Canada symbolized wealth to the prisoners.
Auschwitz became a significant source of slave labor locally and functioned as an international clearing house. Of 2.5 million people who were deported to Auschwitz, 405,000 were given prisoner status and serial numbers. Of these, approximately 50 percent were Jews and 50 percent were Poles and other nationalities. Of those who received numbers, 65,000 survived. It is estimated that about 200,000 people passed through the Auschwitz camps and survived.
In the early years of the regime, Germany was without allies, and its military was drastically weakened by the Versailles Treaty. France, Poland, Italy, and the Soviet Union each had reasons to object to Hitler's rise to power. Poland suggested to France that the two nations engage in a preventive war against Germany in March 1933. Fascist Italy objected to German claims in the Balkans and on Austria, which Benito Mussolini considered to be in Italy's sphere of influence.
The prisoners’ camp routine consisted of many duties. The daily schedule included waking at dawn, straightening one’s sleep area, morning roll call, the trip to work, long hours of hard labor, standing in line for a pitiful meal, the return to camp, block inspection, and evening roll call. During roll call, prisoners were made to stand completely motionless and quiet for hours, in extremely thin clothing, irrespective of the weather. Whoever fell or even stumbled was killed. Prisoners had to focus all their energy merely on surviving the day’s tortures.
The first camp in Germany, Dachau, was founded in March 1933. The press announcement said that "the first concentration camp is to be opened in Dachau with an accommodation for 5,000 people. All Communists and – where necessary – Reichsbanner and Social Democratic functionaries who endanger state security are to be concentrated there, as in the long run it is not possible to keep individual functionaries in the state prisons without overburdening these prisons." Dachau was the first regular concentration camp established by the German coalition government of National Socialist Workers' Party (Nazi Party) and the Nationalist People's Party (dissolved on 6 July 1933). Heinrich Himmler, then Chief of Police of Munich, officially described the camp as "the first concentration camp for political prisoners."