Robert Lochner (engineer) harbours to Franklin Roosevelt and Winston Churchill. The decision to go ahead was taken and full-scale trials of the floating breakwater started in April 1944. During the trial, an onshore gale produced heavy seas, but Robert's bombardons calmed the waves effectively. Assembling two Mulberry Harbours the day after the landings on 7 June 1944 was one of the most remarkable engineering feats in history. A total of 1,500,000 tons of harbour equipment had to be taken across the channel in an operation involving 150 Allied tugs, and by D-Day 'plus 12', most of Lochner's concrete breakwaters were in position. On
Order of battle for the American airborne landings in Normandy Order of battle for the American airborne landings in Normandy The Order of battle for the American airborne landings in Normandy is a list of the units immediately available for combat on the Cotentin Peninsula between June 6, 1944, and June 15, 1944, during the American airborne landings in Normandy during World War II. Allied chain of command Supreme Allied Commander: Gen. Dwight D. Eisenhower 21st Army Group: Gen. Sir Bernard Montgomery U.S. First Army: Lt. Gen. Omar Bradley U.S. VII Corps: Maj. Gen. J. Lawton Collins Maj. Gen. Paul L. Williams (Grantham, Lincs) Brig. Gen. Julian M. Chappell at