Al...
I think that our defeat of the german Luftwaffe and, the inability of germans to invade britain and totally rule the european continent is massively important in the way that WWII panned out.
With the British still in the war however inconsequential this was seen as we as a nation did not sit back we took the war to the german people and bombed the cities and factories among other attacks. The Royal Navy effectively made the battle of the atlantic a u-boat war and ensured large surface raiders like the bismark were where they should belong (at the bottom of the sea) and the succeses of the Scharnhorst and Gneisenau were short lived and, the Tirpitz was a gun platform which never fired.
I mentioned a serious thorn in Hitlers side and, thats what we were, his inability to conquer the Brits was systematic in his plans to invade russia and created the two front war that was so draining on the german war machine. Could we have won alone with say just lend lease aid from the US?? probably not but, the germans would not have been able to defeat us as we grew stronger as they failed when, arguably, we were at our weakest.
We discuss many what if's defeat of the british at that time brings in a lot of them would the US actually have fought the germans and italians had we not been still active in the war?? Even with the resources the US has could they have, even willingly, fought two wars so far apart and given each the support required?? where would, (had these previous questions been answered yes) the second front have been?? France unlikely. Africa?? more than likely but, amphib landings were inantile and, unlikely to have succeded.
So, my point was, obviously, britain did not win the war single handed (don't think I have ever said that) nor, as you mistakenly beleived was I infering it was over done and dusted due to these acts, but, until the US entered properly in terms of troops etc on the ground and, east the huge russian armies and resources we, alone, took the fight to them and did well enough to ensure the writing was on the wall blurred, it may have been but, on the wall it was. A hard slog lay ahead because the german army etc were superb opponents but, and its noted by established and respected historians from many countries that the brits ensured the victory was sooner rather than much later by these early actions.
Mitch