Reposted from last year.
Update: Jonathan Kay on the forgotten casualties of the Slapton Sands exercise:
In the dead of night, just over 68 years ago, 30,000 Allied soldiers stationed in British ports filed onto amphibious landing craft, and put out to sea. The flotilla sailed toward its objective, and all went according to plan — until a German naval squadron patrolling the English Channel spotted the Allied force and opened fire. The defenseless landing craft began burning and sinking, sending more than 600 men to their deaths.
The surviving ships sailed on to their assigned landing zone, disgorging the soldiers onto the beach. There, the killing continued: More than 300 troops died in the sand, blasted to bits by incoming shells. All told, 946 men from among the original 30,000 died that day — a fatality rate of about 3%.
That figure was hardly unusual for major Second World War offensive operations. And yet, amazingly, the tragedy described in the paragraphs above wasn’t actually an offensive operation at all. It was Exercise Tiger, an American training mission that took place in April, 1944 — a full five weeks before D-Day.
The beach that the men landed on wasn’t in Nazi-occupied Europe, but Slapton Sands on the Devon coast. And the shells that rained down on the dunes were fired not from German artillery positions, but by guns on the British cruiser HMS Hawkins. As British historian Giles Milton notes, “the Supreme Allied Commander, General Eisenhower, had ordered that real ammunition be used, so that men would experience actual battlefield conditions. It was a disastrous decision.”