Local SS and police forces set up these first camps. However, very soon the Nazi leadership began to develop a systematic and centrally controlled system of camps. Later, as the Nazi regime imposed their influence over countries they occupied, they developed a range of different types of camps. These were concentration camps, transit camps, forced-labour or work camps and extermination camps.
For two years, they lived in a secret attic apartment behind the office of the family-owned business at 263 Prinsengracht Street, which Anne referred to in her diary as the Secret Annex. Otto Frank’s friends and colleagues, Johannes Kleiman, Victor Kugler, Jan Gies and Miep Gies, had previously helped to prepare the hiding place and smuggled food and clothing to the Franks at great risk to their own lives.
We were sent to the Radom ghetto, where I spent the first years of the war working for the Jewish committee. But when they started taking the ghetto leaders to Auschwitz, I quickly changed jobs and began working in a munitions factory instead, hoping that if I kept my head down, I might be OK. But after moving from one factory to another, I too was deported to Auschwitz when the ghetto was liquidated in 1942. I was separated from my parents and three sisters, all of whom were taken to Treblinka.
In early November 1944, Anne was put on transport again. Together with her sister, she was deported to the Bergen-Belsen concentration camp. Her parents stayed behind in Auschwitz. The conditions in Bergen-Belsen were horrible, too, there was a lack of food, it was cold, and Anne, like her sister, contracted typhus. In February 1945 they both died owing to its effects, Margot first, Anne shortly afterwards. 
There was one latrine for thirty to thirty-two thousand women and we were permitted to use it only at certain hours of the day. We stood in line to get in to this tiny building, knee-deep in human excrement. As we all suffered from dysentry, we could barely wait until our turn came, and soiled our ragged clothes, which never came off our bodies, thus adding to the horror of our existence by the terrible smell that surrounded us like a cloud. The latrine consisted of a deep ditch with planks thrown across it at certain intervals. We squatted on those planks like birds perched on a telegraph wire, so close together that we could not help soiling one another.[124]
By 1940, the CCI came under the control of the Verwaltung und Wirtschaftshauptamt Hauptamt (VuWHA; Administration and Business office) which was set up under Oswald Pohl.[25] Then in 1942, the CCI became Amt D (Office D) of the consolidated main office known as the SS-Wirtschafts-Verwaltungshauptamt (SS Economic and Administrative Department; WVHA) under Pohl.[25] In 1942, the SS built a network of extermination camps to systematically kill millions of prisoners by gassing. The extermination camps (Vernichtungslager) and death camps (Todeslager) were camps whose primary function was genocide. The Nazis themselves distinguished the concentration camps from the extermination camps.[26][27] The British intelligence service had information about the concentration camps, and in 1942 Jan Karski delivered a thorough eyewitness account to the government.

On 26 June 1933, Himmler appointed Theodor Eicke commandant of Dachau, who in 1934 was also appointed the first Inspector of Concentration Camps (CCI). In addition, the remaining SA-run camps were taken over by the SS.[14][15][16] Dachau served as both a prototype and a model for the other Nazi concentration camps. Almost every community in Germany had members who were taken there. The newspapers continuously reported on "the removal of the enemies of the Reich to concentration camps" making the general population more aware of their presence. There were jingles warning as early as 1935: "Dear God, make me dumb, that I may not come to Dachau."[17]