Volkspolizei-Bereitschaft
The Volkspolizei-Bereitschaften (VPB, German for "People's Police Alert Units", sometimes known as "Barracked People’s Police" or "Alert Police") was the paramilitary police force of the Volkspolizei of the German Democratic Republic. Like in many Warsaw Pact countries, The VPB were organized as Internal Troops and served as a riot police and gendarmerie-like force.
Source: Wikipedia — Volkspolizei-Bereitschaft (CC BY-SA 4.0)