[Lokakyy]

The term and modern concept of concentration camps actually comes from the Spainish and their wars in Cuba. Really the idea of placing a broadly defined 'enemy' group in a camp under guard wasn't new even then. Rounding them up for the purpose of wiping them out however was not common.

I agree.

The uniqueness of the Holocaust rests not on the concentration camps, but in extermination camps like Belzec, Treblinka and Sobibor (and Auschwitz, though it was a hybrid camp), where the sole purpose was to murder the people sent there in a matter of few hours and dispose their bodies, with no intention to actually accommodate them any longer than necessary.