During the Battle of the Bulge in World War II, Operation Währung ("Currency" in German) was a special operation conducted as part of Wacht am Rhein. A small number of German commandos infiltrated Allied lines in American uniforms. These commandos' intention was to take some bridges over the Meuse river for their own advancing, to sabotage and so to disrupt Allied supply operations. All those taken prisoners were executed as spies by the US Army. This operation was not successful. See Operation Greif.