 Here they were involved in establishing and defending the landing beaches against German counterattacks at the same time as carrying out their assigned tasks of controlling the beaches to ensure the steady and efficient flow of supplies and men to the front.The parties remained in Normandy for about six weeks before they were withdrawn to reconstitute in preparation for further operations.These operations were limited in scope after the effort of D-Day, but included participation in the assault on Walcheren with the Royal Marines Commandos from the 4th Special Service Brigade and attempts by ‘L’ and ‘M’ Commandos to cross the Rhine at Arnhem during Operation Market-Garden.