I have searched the archives and have not found a decent answer, or really even this question be asked before.

But the question is, how important was the U.S in WW1?

Did the U.S literally come to the rescue of England and France?

Had the U.S not intervened, would Germany and their allies been victorious?

I am from the U.S, so we have always been taught how important of a role we played in WW1 and WW2. I know we were necessary in WW2, but is it the same for WW1?