On November 23, 1946, the French fleet began a naval bombardment of the Vietnamese sections of Haiphong that killed over 6,000 Vietnamese civilians in one afternoon. The Việt Minh quickly agreed to a cease-fire and left the cities. This is known as the Haiphong incident.
Labor Thanksgiving Day is a national holiday in Japan. It takes place annually on November 23. The law establishing the holiday, which was adopted during the American occupation after World War II, cites it as an occasion for commemorating labor and production and giving one another thanks. It has roots in the ancient Shinto harvest ceremony (Niiname-sai).
The bombardment of Haiphong by French forces at Hanoi only strengthened the belief that France had no intention of allowing an autonomous, independent state in Vietnam. The bombardment of Haiphong reportedly killed more than 6000 Vietnamese civilians. French forces marched into Hanoi, now the capital city of the Socialist Republic of Vietnam.