Given the numerous camps and the guards needed to run them many people, like me, think a hell of a lot more Germans knew what was going on than will admit.
http://www.jewishvirtuallibrary.org/jsource/Holocaust/cclist.htmlThis list is far from complete. It is estimated that the Nazi established 15,000 camps in the occupied countries. There were several small camps which were created for limited in time operations against local population. Most of these camps were destroyed by the Nazis themselves, sometimes after two or three months of activity. This list does not contain the names of the ghettos created by the Nazis, even if several ghettos (i.e. Theresienstadt ghetto) had their own external kommandos (work team).
In GermanyBergen-Belsen (probably 2 subcamps but location is unknown)
Börgermoor (no sub-camp known)
Buchenwald ( 174 subcamps and external kommandos)
Dachau (123 subcamps and external kommandos)
Dieburg (no sub-camp known)
Esterwegen (1 sub-camp)
Flossenburg (94 subcamps and external kommandos)
Gundelsheim (no sub-camp known)
Neuengamme (96 subcamps and external kommandos)
Papenburg (no sub-camp known)
Ravensbruck (31 subcamps and external kommandos)
Sachsenhausen (44 subcamps and external kommandos)
Sachsenburg (no sub-camp known)
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Check out 'Hitler's Willing Executioners'. That'll open your eyes as far as who knew in those days.
Let's keep this in perspective.