Historical information
The National Liberation Front Flags 1955-1976
The Viet Cong, or National Liberation Front, was the patriot/rebel army based in South Vietnam that fought the South Vietnamese government and the supporting United States troops during the Vietnam War (1959-75). They fought mainly as guerrilla units and rarely as regular army units. They also provided a network of cadre who organized the peasants against the government in the territory they controlled.
The Viet Cong were closely allied with the government of North Vietnam. The group was formed in the 1950s by former members of the Viet Minh acting on orders from Hanoi. They proved highly effective against both ARVN (Army of the Republic of Vietnam) and later against the better equipped American troops.
There were at least four types of flags, probably more, seen being carried by the Viet Cong. Type #1 had a small yellow star centered over a red and blue striped background, Type #2 had a larger white star centered on the red and light-blue striped background, Type #3 had either a large or small yellow star centered on a red and white striped background, and Type #4 had three vertical stripes of red/white/red with a small gold star centered on the white stripe. Like the early flags of the American Revolution, most flags were hand-made and each flag was a little different. Some examples of these variant flags also had Vietnamese text added to them.
http://www.loeser.us/flags/cold.html#vietnam
Physical description
Cotton flag with a red upper half and bluish lower half An Orange star is in the centre.
The flag is very water damaged with extensive fading of the colour. It was initially difficult to differentiate between a Type 1, Type 3 and Type 5 flag