Pious Young Lad,
I reckon you think you would have whipped the Germans and Japanese all by yer selves!
If we had not joined the affray for the second time in forty years you would be speaking German, eating Schnitzel, and driving VW's.
Perhaps if the UK and Europeans had done more to put Hitler into his place early on, there would have been no war and we dstardly Americans would not have been forced to participate and could have lived on in Peace way across the Atlantic and have defended our own shores.
You recall Hitler did not want war with the United States....as he did not with the UK either....but when it all went egg shaped....your government declared War on the Germans despite not having been attacked by them.
Who do you reckon is more responsible for your war debt.....your political leaders who declared War....the Germans....or the Americans?
Read your history Lad.....all of it!