The United States' entry into WWI had nothing to do with forcing Germany to trade. Literally nothing. I'll let you refresh your own memory regarding events at that time, including Germany's unrestricted submarine attacks on American civilians.
But I definitely agree that it has pretty much nothing to do with the OP's point.
Did you know that USA and allies attempted to keep the Tsars in power against the Soviet Revolution of 1918? I didn't until now...
https://en.wikipedia.org/wiki/United_States_involvement_in_r...
Edit: In fact, the American president was more than pleased that in his request for the US to declare war that, with the "democratic" Karenski government, the war had become Democracy vs Autocratic and it was ok to enter at that point on the side of Democracy.