Lang Vay Village is in Tan Long Commune, Huong Hoa District, Quang Tri Province. The village is home to the Bru-Van Kieu and Paco ethnic peoples. Lang Vay Village is by Route 9 from Dong Ha City to Laos, 15km south of the former DMZ. 

This whole region of the former DMZ of Vietnam found lots of military operations, brutal battles during the war: the Battle of Lang Vay (or mispelled Lang Vei), the Battle of Khe Sanh, the Battle of the Ancient Citadel of Quang Tri... 

The Battle of Lang Vay took place on 6 and 7-February-1968 at the new site of the Special Forces (SF) Camps Lang Vei, 800m west of the site of the old camp of the same name. These camps were located on a basaltic hill 1km south of Km 75 of Route 9, 15km southwest of the Ta Con Airfield, 3km east of the Sepon River which forms part of the border between Vietnam and Laos.

The history of the military camps in this region started from the French times. There was a French stronghold called Lang Vay Camp from 1948. In 1962, the US built CIDG (Civillian Irregular Defense Group) camps on the same site called Lang Vei Special Forces (SP) Camp. 

From the beginning of 1966, the US built more and more strongholds and military camps, and conducted more operations along Route 9 in efforts to block flows of men and ammunitions from North Vietnam into South Vietnam. These efforts became more of a nuissance to the PAVN (People's Army of Vietnam, or North Vietnam's Army). And the PAVN insisted on clearing the paths to South Vietnam by removing all obstacles around the DMZ.

In 1967, Lang Vei had 24 berets and 900 CIDG soldiers. The mission of the forces at Lang Vay was surveillance of the infiltrations of the PAVN into South Vietnam as well as supervising local communities. 

2-March-1967 Two US F-4 Phantom dumped bombs on Lang Vay Village killing 100 and wounding 175 civillians. The reason claimed was friendly fire.

3-May-1967 the Lang Vay SP Camp (on the former site) was destroyed by the PAVN. The the SP Camps were relocated to a new site but still referred to as Lang Vei SF Camp, 800m west of the old SP camp. The reason for the relocation was that the position of the old camp was not advantageous; the new one had better views of the surroundings. The construction of the new Lang Vay Camps were started in mid June 1967 and completed on 26-November-1967.

The remains of the old camp of Lang Vei and the village were used to accommodate elements of 33th Battalion of the Royal Laotian Army (over 500 fighters) and their dependents (over 2,200 peopple) after the fall of the Houei Sane Camp on 23 and 24-January-1968. The Houei Sane Camp in Laos had been to assist the US with surveillance of PAVN movements along Ho Chi Minh Trails.

The battle of Lang Vay was one of a series of battles of the Route 9 Campaign by the PAVN which was later known to be part of the Tet Offensive in South Vietnam in 1968. Paradissa arrange battlefield tours and Vietnam War tours to visit the old sites of the famed battles during the war in Vietnam.