The US Army's 330th Ordnance Company maintained the then classified stocks of GB and VX nerve gas located at Site 59 in Clausen.

In addition, the fence line was supposedly sprayed with Agent Orange to deter weeds.

When the US military began to downsize in the 1990s, the small US Army posts associated with Husterhoeh Kaserne (Pirmasens) were returned to Germany, including ones located at Maßweiler, Munchweiler, Fischbach, and Clausen.

A large number of former soldiers, who worked at Site 59, report illnesses consistent with nerve gas exposure.

The fields east of Clausen contain many concrete tank barriers remaining from WWII.