'Dunhill' was a British special forces operation by the 2^nd Special Air Service to harass the German retreat in the Fougeray area and to observe and report on German movements in the Rennes and Laval region of German-occupied north-western France (3/24 August 1944).

This operation was designed to support 'Cobra', and its 59 men were parachuted into their operational area to operate in five parties, four of which were 'overrun' by friendly forces within one day of their arrival by the speed of the development after the US break-out from the Normandy lodgement. The fifth party achieved greater success, however, including the rescue of 200 downed Allied airmen, before the SAS party linked up with US ground forces on 24 August.