<p>The Allied invasion of occupied France began by delivering three airborne and six infantry divisions onto a 60-mile stretch of the Normandy coast. Accomplishing this involved over 1,200 transport aircraft, 450 gliders, 325 assorted warships and more than 4,000 landing vessels. The first 72 hours of the D-Day invasion were pivotal ? from the initial airborne landings in the early hours of Tuesday 6 June 1944 we follow the Allied attackers and t...