芦沟桥 lúgōuqiáo Lugou Bridge Origin Definitions Defs Strokes Stroke Words Sentences Sents 芦沟桥事变 lúgōuqiáoshìbiàn Marco Polo Bridge Incident The incident on July 7, 1937, that marked the beginning of the Second Sino-Japanese War; also known as the July 7th Incident.