Border guards of the inner German border
The border guards of the inner German border comprised tens of thousands of military, paramilitary and civilian personnel from both East and West Germany, as well as from the United Kingdom, the United States and initially the Soviet Union. == East Germany == The East German side of the border was guarded initially by the Border Troops (Pogranichnyie Voiska) of the Soviet NKVD (later the KGB).
Source: Wikipedia — Border guards of the inner German border (CC BY-SA 4.0)