The Longest Day (1962)

England in June 1944. Unseasonal storms. Allied troops are massed ready for the invasion of France, some already on the boats. The Normandy beaches will be their destination while paratroopers are dropped inland to take key towns and bridges. On the other side of the Channel the Germans still expect the invasion at Calais, and anyway the weather makes them think nothing is likely to be imminent. Eisenhower decides to go. Hitler sleeps on.