Some of the men are in uniform and those that aren't appear bedraggled and unkempt
This image shows an exhausted prisoner asleep against a wall. The camps were a vital terror tool wielded by the SS and SA
Dachau, was one of several larger camps established by the SS including Oranienburg, Esterwegen, and a facility for women in Lichtenburg, Saxony.
In Berlin itself, the Columbia Haus facility held prisoners under investigation by the Gestapo (the German secret state police) until 1936.
The first concentration camps were set up in early 1933 and their numbers expanded rapidly after the Reichstag Fire.
In 1934 Hitler authorised SS leader, Heinrich Himmler, to formalise the administration of the concentration camps into a system.
Himmler chose SS Lieutenant General Theodor Eicke for this task as he had been the commandant of the SS concentration camp at Dachau since June 1933. Himmler appointed him Inspector of Concentration Camps, a new section of the SS.
While Dachau was not an extermination camp, such as Auschwitz, Treblinka or Sobibor - prisoners were still forced to live under the most appalling conditions and would face the prospect of death on a daily basis.
The expert added: 'One should not get the impression these were not as bad as the extermination camps. Hundreds of thousands of people died inside concentration camps.
'The prison guards could kill anybody they wanted. If they felt like it they would shoot you on sight. Inmates faced the imminent possibility of dying at any minute.
'Although people were shipped in to work they were still completely expendable.'
German authorities established camps all over Germany to handle the masses of people arrested as alleged subversives
Rations: Bread is doled out among the prisoners. Starvation was itself a weapon used on the inmates
SS Lieutenant General Theodor Eicke was appointed to oversee the Concentration Camps by Himmler in 1933
The organisation, structure, and practice developed at Dachau in 1933-1934 became the model for the Nazi concentration camp system as it expanded. Eicke issued regulations both for the duties of the guards and for treatment of the prisoners.
Among his early trainees at Dachau was Rudolf Höss, who later commanded the notorious Auschwitz concentration camp. It is not known who took the pictures, which offer a candid and insightful look at the murderous system's earliest victims.
A system of triangle badges was used to identify the inmates. Political prisoners wore a red triangle, criminals green, homosexuals pink and Jehovah’s Witnesses purple. Jewish prisoners were forced to wear an additional yellow Star of David under their classification triangle.
By the time the Germans invaded Poland in September 1939, unleashing World War II, there were six concentration camps in the so-called Greater German Reich: Dachau, Sachsenhausen, Buchenwald, Flossenbürg, Mauthausen in Austria and Ravensbrück, the women's camp.
As the war raged the concentration camps increasingly became sites where the SS authorities could kill targeted groups of real or perceived enemies of Nazi Germany.
They also came to serve as holding centers for a growing pool of forced laborers deployed on construction projects, industrial sites, and, by 1942, in the production of armaments and weapons for the German war effort.
German authorities established camps all over Germany to handle the masses of people arrested as alleged subversives
Between 1939 and 1942 the Nazis were rounding up more and more prisoners in the camps, including those they deemed racially inferior, such as Roma gypsies and Jews.
Constructed gas chambers to efficiently murder people at several of the concentration camps. Gas chambers were constructed at Mauthausen, Sachsenhausen, Auschwitz, and other camps. A gas chamber was constructed later at Dachau, but never used.
By the close of the Second World War there was a network of over 40,000 facilities in Germany and German-occupied territory.
An estimated six million Jews and millions more Poles, Russian soldiers, gypsies, homosexuals and other 'undesirables' lost their lives in the camps.
Merciless: The dead are loaded onto a train for disposal