I think because of the Holocaust, most of the concentration camps were in Europe.
The key distinction was between extermination camps and labour camps ("ordinary" concentration camps).
they were in Germany and through out Europe.
In Europe during the time of WWII
None.
In the concentration camps, Jews and everyone else marched around the camps.
Europe, Poland Auschwitz
Poland
From 1940 onwards most of the very large concentration camps were in Poland or in areas annexed from Poland. they varied all in germany. Europe held a lot of the concentration camps. they lived in germany.
as in WWII all over Europe. all of Europe was a huge concentration camp.
konzentrationslager.....German translation
exactly where they were left, in former occupied Europe.