The workers who constructed the original buildings were housed in camps near Fallingbostel and Bergen, the latter being the so-called Bergen-Belsen Army Construction Camp. Once the military complex was completed in 1938/39, the workers' camp fell into disuse. However, after the German invasion of Poland in September 1939, the Wehrmacht began using the huts as a prisoner of war (POW) camp.
Advocacy organizations worldwide called for British Royal Air Forces to bomb concentration camps particularly at Auschwitz. Although the plan was adopted by British Prime Minister Winston Churchill poor information-sharing between parts of the British government led the order to be ignored and the plan dropped. Such calculations were hardly the low point of Allied Responses. One story has that, low on supplies, the Nazis offered the British a million Jews in exchange for 10,000 trucks, which one British diplomat promptly refused saying, “What would I do with one million Jews? Where would I put them?”
With the invasion of the Soviet Union on June 22 1941, the Nazis launched a crusade against 'Judaeo-Bolshevism', the supposed Jewish-Communist conspiracy. Behind the front lines, four police battalions called Einsatzgruppen (operations groups) moved from town to town in the newly occupied Soviet territories, rounding up Jewish men and suspected Soviet collaborators and shooting them. In subsequent sweeps, making heavy use of local volunteers, the Einsatzgruppen targeted Jewish women and children as well. In total, the Einsaztgruppen murdered some two million people, almost all Jews.
According to Marcus J. Smith, a US military doctor who was assigned to Dachau after it was liberated, there was an "experimental farm, the Plantage" just outside the concentration camp. Smith wrote in his book "The Harrowing of Hell" that "When the Reichsfuehrer SS (Himmler) inspected, he seemed particularly interested in the Plantage, discoursing enthusiastically on the medicinal value of herbs."
Typhus, transmitted by body lice, which had been prevalent in the ghettos and death camps in occupied Poland throughout the war, now spread to the concentration camps in Germany. After January 1945, conditions in all of Germany and Austria, including the concentration camps, became intolerable due to the chaos caused by the intensive Allied bombing of civilian areas in all the major cities.
MoshePeer and his siblings - who all survived - were cared for at the camp by two women, whom Peer unsuccessfully tried to find after the war. Peer was reunited with his father in Paris and the family moved to Israel. Peer's four children were born in Israel, but after serving in the Israeli army in a number of wars, Peer moved to Montreal in 1974. Even today 55 years later, Peer is still haunted by his concentration-camp experience and still finds his memories keep him awake at night.
On November 2, 2014 the heavy metal gate bearing the slogan "Arbeit Macht Frei" (work sets you free) was stolen from the Dachau memorial site under cover of darkness. Security officials who supposedly keep a 24 hour watch on the memorial site believe that the heist was well orchestrated and planned out, and took place between the hours of midnight and 5:30am on Sunday November 2. Estimates place the weight of the gate at at least 250 lbs, so officials believe that multiple people took part in the theft.
Although not ordered to take part, psychiatrists and many psychiatric institutions were involved in the planning and carrying out of Aktion T4 at every stage. After protests from the German Catholic and Protestant churches, Hitler ordered the cancellation of the T4 program in August 1941, although the disabled and mentally ill continued to be killed until the end of the war. The medical community regularly received bodies and body parts for research. Eberhard Karl University received 1,077 bodies from executions between 1933 and 1945. The neuroscientist Julius Hallervorden received 697 brains from one hospital between 1940 and 1944: "I accepted these brains of course. Where they came from and how they came to me was really none of my business."
Due to horrific overcrowding and the spread of contagious diseases brought from what is now Poland by new arrivals who had been evacuated from the death camps, the number of recorded deaths at Dachau in the last four chaotic months of the war jumped to 13,158. After the camp was liberated by the US Seventh Army on April 29, 1945, an additional 2,226 prisoners died from disease in the month of May and 196 more died in June.
After 1945 the name was applied to the displaced persons camp established nearby, but it is most commonly associated with the concentration camp. From 1941 to 1945, almost 20,000 Soviet prisoners of war and a further 50,000 inmates died there. Overcrowding, lack of food and poor sanitary conditions caused outbreaks of typhus, tuberculosis, typhoid fever and dysentery, leading to the deaths of more than 35,000 people in the first few months of 1945, shortly before and after the liberation.