Operation Overlord saw some 156,000 Allied troops landing in Normandy on June 6, 1944.
It is thought as many as 4,400 were killed in an operation Winston Churchill described as 'undoubtedly the most complicated and difficult that has ever taken place'.
The assault was conducted in two phases: an airborne landing of 24,000 British, American, Canadian and Free French airborne troops shortly after midnight, and an amphibious landing of Allied infantry and armoured divisions on the coast of France commencing at 6.30am.
The operation was the largest amphibious invasion in world history, with over 160,000 troops landing. Some 195,700 Allied naval and merchant navy personnel in over
