During World War II, Operation Dunhill was an abortive Special Air Service operation which began on 3 August, 1944. The five teams, totaling 59 commandos were to disrupt German activity in advance of the American breakout from Normandy.

In the event, four of the teams were relieved by the advancing Americans within twenty-four hours.

The fifth team reported on German movements and secured about 200 Allied airmen before they linked up with the ground forces on 24 August.

See Operation Cobra.