The Haiphong Incident or the Haiphong Massacre occurred on November 23, 1946, when the French cruiser Suffren bombarded the Vietnamese coastal city of Haiphong, killing some 6,000 Vietnamese people. The incident, also known as the Shelling of Haiphong, is thought of as the first armed clash in a series of events that would lead to the Battle of Hanoi on December 19, 1946, and with it the official outbreak of the First Indochina War.