"After World War II, Germany was divided into British, French, American, and Soviet occupied zones. These later became the basis for the NATO-aligned West Germany and the Communist East Germany. Initially, Soviet and Western forces provided security within their own occupied zones. However, as in Japan, tensions led to the creation of local armed forces in the 1950s; the West German Bundeswehr and the East German Nationale Volksarmee. Though neither army saw significant combat, for the duration of the Cold War they stood along the Iron Curtain, ready to fight on the front lines of a potentially apocalyptic Third World War."
If used in large groups; the Bundeswehr can be devastating and can destroy a base easily; if not in heavy fire.
Mortars are devastating against Bundeswehr and can kill a group of them in a few hits if in the range of the impact. Spread your Bundeswehr around so the mortar would have to hit each Bundeswehr to kill it and that its impact would not affect other Bundeswehr as well or deploy a few heavy cavalry to destroy it.