'Grebe' was a British operation by the Special Operations Executive to establish a small force, independent of the Milorg (military resistance movement in Norway) in the hills of German-occupied Norway with supply direct from the UK (10 October 1943/January 1944).

The party was also directed to reconnoitre the Røros and Dovre railways so that, should the occasion arise, German troops movements could be halted by attack or demolitions. The six-man party (T. Hoff, J. Beck, H. Løkken, H. Storhaug, A. Øvergård and A. Graven) was parachuted into Norway on 10 October, but three of the party were killed on landing and the remaining three had therefore to abandon the mission and escape to neutral Sweden, in which they remained until the following January.