You seem to forget the ‘heavy lifting’ that the UK and Empire did from September 1939 until December 11, 1941, when the US FINALLY declared war on Germany.
It should be noted that the UK declared war on the Japanese Empire nine hours before the US declaration because of Japanese attacks on Malaya, Singapore, and Hong Kong, where so many Canadians died defending HK.
Of course, in spite of the Kraut attrocities in both WWI and WWII, the US entered WWI very late ONLY after the Lusitania sinking, the resumption of unrestricted U-boat attacks, and the Zimmermann Telegram. Of course, America was full of Hun during both World Wars, so neither Wilson, nor Roosevelt wanted to risk losing Heinie votes. Also, there was a hell of a lot of MONEY TO BE MADE selling EVERYTHING to the UK and her Empire. When the money ran out, when the Allies we’re spent, only then did the US finally entered both wars. That turned out to be a good thing, as the US had started to ramp up war production, supplying it’s own needs and supplying much of the Allies’ needs.
Of course, the UK, the other Euros and Canaduh have all falling into the socialist, muhamedan pit. At least the US is seemingly pulling itself out of the Obamanation it had become.