Combat Groups of the Working Class
The Combat Groups of the Working Class (KdA; German: Kampfgruppen der Arbeiterklasse, lit. 'Struggle Groups of the Worker Class') was a paramilitary organization in the German Democratic Republic (GDR) from 1953 to 1989. The KdA served as the de facto militia of the ruling Socialist Unity Party of Germany composed of party members and politically reliable working people, based on the principle of the dictatorship of the proletariat, to be deployed locally to fight civil unrest or invasion.
Source: Wikipedia — Combat Groups of the Working Class (CC BY-SA 4.0)