'Harrier' was an Allied unrealised plan for an attack on the 138^th Gebirgsjägerregiment of Generalleutnant Eduard Dietl’s 3^rd Gebirgsdivision, which had been landed by the ships of Gruppe II within 'Weserübung' to take Trondheim on the west coast of Norway in 'Wildente' (i) (April 1940).