Captain Haddock wrote:We let the US be leader because they had saved Europe. Twice.
I would have said:
WW1: America saved Europe? That was certainly the American view at the time, as Wilson (Woodrow, that is) bragged: ‘We saved the world, and I do not intend to let those Europeans forget it.’ And they haven't ever since.
But ‘assisted’ would be closer to the truth. The USA was never formally an ally and, when it did eventually enter the war in 1917, its troops were held off major land fighting until summer 1918 when the German forces were pretty much spent anyway. Foch commanded the allied victory, not Pershing. The USA’s contribution was greater in terms of food shipments.
But, on second thoughts, as that would be a pointless discussion, I won't bother.