1: I am American and am certainly biased.
2: America is destined to join WW1? You sure about that? Check your history books again. If this was WW2 than yes but WW1.
... The Russians are going to lose the war with Japan. Yeah okay I still believe that's possible. But you just did everything you could to wreck Japans economy. There is no guarantee that they will win now because you just changed history.