 Complete the following phrase:  Carried in Horsa gliders, the battalion took part in Operation Mallard, the British glider-borne landings in the later afternoon of 6 June 1944, otherwise known as D-Day. They served throughout the Battle of Normandy employed as normal infantry until August 1944 and the breakout from the Normandy beachhead where the entire 6th Airborne Division advanced 45 miles in 9 days. They returned to England in September 1944 for rest and retraining until December 1944 when the 6th Airborne was then recalled to Belgium after the 