The flag of Vietnam, or "red flag with a gold star" (cờ đỏ sao vàng), was designed in 1940 and used during an uprising against French rule in southern Vietnam that year. The background was inspired by the red flag, used by the international communist movement since the Paris Commune of 1871. Red symbolizes revolution and blood. The five-pointed yellow star represents the unity of workers, peasants, intellectuals, youths and soldiers in building socialism.
The flag was used by the Viet Minh, a communist-led organization created in 1941 to oppose Japanese occupation. At the end of World War II, Viet Minh leader Ho Chi Minh proclaimed Vietnam independent and signed a decree on September 5, 1945 adopting the flag as the flag of the Democratic Republic of Vietnam. The DRV became the government of North Vietnam in 1954 following the Geneva Accords. The flag was modified on November 30, 1955 to make the edges of the star sharper. Until the end of the Vietnam War in 1975, South Vietnam used a yellow flag with three red stripes. The red flag of North Vietnam was adopted as the flag of the Socialist Republic of Vietnam in 1976.
It was designed by Nguyễn Hữu Tiến, a revolutionary against French colonization.