Well it was really like most times USA came to help a nation under threat everyone knows Japan was all over China so this happened. Now China is all over the rest of the globe including a virus. It was a Win Win and they say now this is why the Nationalists lost and the Communist Party got power..
Off topic though so Go TNG ....
Why did America help China in ww2?
In 1940 and 1941, President Franklin D. Roosevelt formalized U.S. aid to China. ... Although this did not lead to an immediate embargo, it meant that the Roosevelt Administration could now restrict the flow of military supplies into Japan and use this as leverage to force Japan to halt its aggression in China.
