During the Nazi era, there were active, underground resistance organizations at several of the camps, such as those at Sachsenhausen, Buchenwald and Dachau.
[1] The concentration camp committees are international organizations because their members come from and live in many different countries.
The purpose of the committees is to educate the world about what was done under the Third Reich regarding the arrest and deportation of religious, political and social groups considered "undesirable" by the National Socialists.
[2][3][4] The committees' efforts have resulted in the establishment of numerous camp memorials and commemorative events and displays.
[7] A document was produced under the auspices of the International Auschwitz Committee that was signed by representatives of ten different Nazi concentration camps in Berlin on January 25, 2010.