What did Nazi soldiers do in the concentration camps?

I am doing a research project on ww2 and I need to find out what the responsibilities/roles were of the nazi soldiers IN the concentration camps. I’ve done some research about the guards, but thats about it. I am having a really hard time coming up with some research about this topic.

Here’s a start.

Here’s an intro with links.

But, nothing like a first person account.

And, remember, the death camps and the concentration camps were very different things (with Auschwitz and to a lesser extent, Majdanek, having elements of both).

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