To identify which group of Jews they came from.
Jews who were chosen to work were tattooed at Auschwitz. See Related Links below.
In the Auschwitz group of camps (which by 1943 included 45 subcamps) prisoners used as labourers were tattoed, whether Jews or non-Jews). So this would have included the non-Jewish Polish prisoners. At other camps, the prisoners were generally not tattooed.
Jews selected for work at the Auschwitz group of camps were registered and tattooed. This was not done at other camps and they were not branded.
The tattoo was their prison number which was used like their names. However, contrary to a widespread misconception, tattooed numbers were only used in the Auschwitz group of camps.
The inmates of concentration camps had no rights at all.
They were in both..
In the concentration camps, Jews and everyone else marched around the camps.
what was Hitler's purpose for sending Jews to concentration camps and what is a concentration camp.
yes, all inmates were beaten in concentration camps.
They were sent to ghettos prior to the Concentration Camps...
JEWS
Jews.