This Day in History: The Marco Polo Bridge Incident

By Steve George, July 8, 2023

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Generally regarded as the ‘official’ start of China’s resistance against Japanese aggression, despite its relatively low casualties, the Marco Polo Bridge Incident of July 7, 1937 is one of the most significant battles of the Second Sino-Japanese War, directly leading to Japan’s occupation of Tianjin and Wanping (today part of Beijing’s Fengtai District).

The Japanese army controlled the north, east and south sides of Beijing, but the Marco Polo Bridge, southwest of central Beijing, remained in Chinese hands. 

In order to cut off Beijing entirely, Japan needed control of the bridge. Thus they manufactured a provocation that could be used to justify an escalation of hostilities.

The army held a military exercise without informing Chinese authorities, during which, according to an intelligence officer, a Japanese soldier was reported missing after gunshots were heard. The Japanese used the search for the AWOL soldier as a pretext to enter Wanping – which China refused.

At about 5am on July 8, the Japanese launched an artillery attack and both sides joined battle, with the fight soon taken to Tianjin; the city was captured at the end of July.

The incident marked the second instance of cooperation between the Communist Party and Kuomintang (KMT) forces. The anti-Japanese National United Front was formed, with the Red Army rebranded the Eighth Route Army and the New Fourth Army of the KMT.

For more This Day in History stories, click here.

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