aug 1, 1931 - Japan invaded N. China

Description:

Communist and nationalist part joined to defeat Japan

Then - Civil War

Before this tho the nationalist party (Led by Chiang Kai-Shek) was at odds with the communist party(led by Mao Zedong)

they paused briefly when Japan invaded but then continued after resulting in the communist being backed by the Soviets, and China essentially becoming communist.

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