What happened between China and Japan during WWII?
China, like other areas across Asia such as Manchuria, was invaded before the United States joined WWII by Japan. The Japanese were attempting to build an expansive, powerful, and militaristic empire (just like Hitler was trying to in Europe at the time) across Asia and had controlled areas across the Pacific and saw China as a target. The Chinese resisted Japanese takeover. The Japanese, like in the places they had already conquered, executed lots of people. Japan is to blame for their aggression. Indirectly. Because of the massacres of innocent people in China at the hands of the Japanese, I’m sure many hostilities are still present.
