The Overlord plan called for the use of airborne troops to secure the flanks of the D Day landing and to form a buffer to keep the German counter-attacks away, thus allowing 3rd Division to advance from Sword Beach to seize Caen. 6th Airborne Division was given this task. It was later to be joined by Lord Lovat's Commando Brigade..These tasks included seizing Pegasus Bridge and Merville Battery by 9 Para, whose guns were thought to dominate Sword Beach.Meanwhile, the remainder of the 3 and 5 Parachute Brigades were to secure key objectives. In the event they were widely scattered and facing counter-attack by 21st Panzer Division. Despite this the men of 6th Airborne heroically achieved their mission.