That was the Autumn of 1918, by November the Armistice had been signed.
As for your account on WW2, well a lot of that is in the what if vein. Britain wasnt actually at war with Japan until after the Pearl Harbour attack.
If you want to know who put in the greatest effort or had the best soldiers or who won the war I can tell you. They ALL did or had.
Nothing I said about WW2 is in a "what if" vein. At the end of December, 1941, it was over for Britain in the Far East, and New Zealand and Australia were in danger.
You make my point. It wasn't America that won WW1, it was a bacteria. In WW2, it was "what if", not the fact that without America, no nation on earth was going to dislodge the Japanese Empire from their perch.You can say, "thank you", it won't kill you.