China and Japan at war – how the two powers became locked in a series of bloody conflicts

On July 7, 1937 a Japanese soldier went missing near the town of Wanping, outside Beijing. Known as the Marco Polo Incident, this affair became the catalyst for the second Sino-Japanese war. The two powers were locked in bloody conflict throughout the first half of the 20th century

Sources: North Central College; World War II Magazine; Dorling Kindersley; Encyclopaedia Britannica; National Geographic; World War II Database 

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