The school closed in 1944 due to the advance of the Allies. In the camps Women were within the ranks of the Nazis at the Nazi concentration camps : these were the Aufseherinnen and generally belonged to the SS. They were guards, secretaries or nurses. They arrived before the start of the war, some of them being trained from 1938 in Lichtenburg. This took place due to the need for personnel following the growing number of political prisoners after the Kristallnacht on 8 and 9 November 1938. After 1939, they were trained at Camp Ravensbrück near Berlin. Coming mostly from lower- or middle-class social origins, they previously worked in traditional professions (hairdresser, teacher, for example) but were, in contrast to men who were required to fulfill military serve, the women were driven by a sincere desire to reach the female wing of the SS, the SS-Gefolge. Of the 50,000 total number of guards at all the Nazi camps, there were 5,000 women (approximately 10% of the workforce). They worked at the Auschwitz and Majdanek camps beginning in 1942. The following year, the Nazis began the conscription of women because of the shortage of guards. Later, during the war, women were also assigned on a smaller scale in the camps Neuengamme Auschwitz (I, II and III), Plaszow Flossenbürg, Gross-Rosen Vught and Stutthof and in the death camps of Bełżec, Sobibór Treblinka and Chełmno. Seven Aufseherinnen served at Vught, 24 were at Buchenwald, 34 at Bergen-Belsen, 19 at Dachau, 20 at Mauthausen, three at Mittelbau-Dora, seven at Natzweiler-Struthof, twenty at Majdanek, 200 at Auschwitz and its sub-camps, 140 at Sachsenhausen, 158 at Neuengamme, 47 at Stutthof, compared with 958 who served at Ravensbrück, 561 at Flossenbürg and 541 at Gross-Rosen. Many supervisors worked in the sub-camps in Germany and some in France, Austria, Czechoslovakia and Poland. There was a hierarchy within the Aufseherin position, including the following higher ranks: the Rapportaufseherin (head Aufseherin), the Erstaufseherin (first guard), the Lagerführerin (head of the camp), and finally, the Oberaufseherin (senior inspector), a post only occupied by Anna Klein and Luise Brunner. Female members of discriminated minorities Under the same threats as men who were Jews or Romani, women belonging to these communities were equally discriminated against, then deported and for some exterminated. In many concentration camps there were sections for female detainees (notably at Auschwitz and Bergen-Belsen) but the camp at Ravensbrück, opened in