Answer:
The war that occurred in 1937 where Japan overran eastern China is known as the Second Sino-Japanese War. It was a military conflict fought between China and Japan from July 7, 1937, to September 2, 1945, which overlapped with World War II in its later years. The conflict started with a dispute over the Marco Polo Bridge Incident and quickly escalated into a full-scale invasion of China by Japan.
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