Operation Cooney was the deployment of elements of the 4ème Bataillon d'Infanterie de l'Air - the 4th Free French Parachute Battalion (later renamed 2ème Régiment de Chasseurs Parachutistes) - also known as 4th Special Air Service.
On 7 June 1944, the 9 aircraft of 38 Group (including two from No. 297 Squadron RAF, dropped the parachutists.
These men were to disrupt enemy communications between West Brittany and the remainder of France, and in all 58 Free French soldiers were dropped on no fewer than 18 undefended drop zones between St. Malo and Vannes.
Breaking into 18 three-man or five-man SAS teams, the commandos scattered throughout Brittany destroying railroad targets. As a sign they had passed through they tied railroad ties around trees.