Overlord: the Normandy landings
It seemed to the Western Allies that the fastest and most direct way to win the war was to confront the bulk of the German Armed Forces in France, and once they had been defeated, to advance swiftly on Germany at the same time as the Soviets were doing so from the east. This meant doing the opposite of what Philip II of Spain, Napoleon and even Hitler himself had unsuccessfully attempted.
The direct approach strategy involved serious risks. Were it to fail, it could mean the total or partial victory of the Germans. At least it would buy them some precious time, which would prolong the war in a terribly bloody fashion. The Americans preferred this solution over the prudence of the British. They ...