What were concentration camps?

prisons for political enemies of the Nazis
prisons for political enemies of the Nazis

a series of campgrounds where young Nazis could enjoy themselves
a series of campgrounds where young Nazis could enjoy themselves

retreats where the Nazi leadership planned for the future
retreats where the Nazi leadership planned for the future

new universities organized by the Nazis to propagate their ideals

Concentration camps were prisons created by the Nazis during World War II. They were primarily used to imprison and exterminate millions of individuals who were considered enemies of the Nazi regime. These included political dissidents, Jews, Roma people, homosexuals, disabled individuals, and others deemed undesirable by the Nazis. Concentration camps were places of extreme suffering, forced labor, and mass killings.