Second Sino-Japanese War
The Marco Polo Bridge Incident
Beijing, China
On the night of July 7, 1937, Chinese and Japanese troops exchanged fire in the vicinity of the Marco Polo (or Lugou) Bridge, a crucial access-route to Beijing. What began as confused, sporadic skirmishing soon escalated into a full-scale battle in which Beijing and its port city of Tianjin fell to Japanese forces (July–August 1937).