I’ll disagree with you concerning Churchill all day long. Yes, he had feet of clay as do we all, but in the aggregate I believe it would be accurate to state he had more to do with Allied success than any other leader, military or civilian.

For instance, look at Gallipoli. His orders had been for the British Fleet to sail in and take the islands and forts in the Bosporus Strait with haste, before the Turks had a chance to respond. Instead, after having lost a couple of ships to mines, the admirals refused and sat back for nearly a month clearing mines before attempting to land troops. The Turks used this time to their great advantage by strengthening their forts and sending as many reinforcements as they could.

That’s why Gallipoli turned out to be such a bloodbath: the admirals were not willing to risk their ships for the mission.

Concerning a cross-channel invasion of northern France, in April of 1942 General Marshall submitted a plan to do just that in 1943, and it was called “Operation Roundup”. It was rejected by FDR in favor of invading Northern Africa…and we have no hard indication as to why FDR made that decision.