Japan began carrying out its colonial policy in 1937, using the pretext that China refused its request to search for missing soldiers to invade the mainland. After war between the two nations officially broke out with the Marco Polo Bridge Incident, the Japanese began to systematically invade and occupy China.

The Japanese had originally planned to defeat the China within three months, but due to the staunch resistance of the Chinese army and citizens, the war dragged on for eight years. During this time, the Japanese troops inflicted countless atrocities on the Chinese people, slaughtering tens of thousands of innocent civilians. This violence came to an end only with the defeat of Japan at the end of World War II.

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