Or have Hitler and Chiang agreed to Firmly put China in the Axis camp. Even if Japan still attack China, as long as they declared for Allies and did not outright attack European colonies, it would be utter mess for USA, as ultimately they will abandon China to fight Germany first.Sure, there will be post war tensions, but it may end up in three way Cold war between USA, Soviet Union, and Japan, in which US Japan "hostility" are only skin deep as Japan's aim are basically 'merely' claim Mandate of Heaven' over China, and if China still goes communist, Westerners may end up outright recognizing a Japanese Dynasty claim over Chinese Throne as long as they paid lip services to Democracy...