WW2

the ss, the staatssicherheit, was some kind of police under hitlèrs control who arrested people who said something against him, were Jewish or weren't "completely german" (the fifth generation of Germans was needed), out of that, it was some sort of fbi, because they were kinda spies who worked in every facility and you were nowhere safe, but it could be that I mixed it up a little with the sa, if you have more questions, ask ahead