High Quality Content by WIKIPEDIA articles! The Battle of Lang Vei began on the evening of February 6 and concluded during the early hours of February 7, 1968, in Quang Tri Province, South Vietnam. Towards the end of 1967 the 198th Tank Battalion, Vietnam People’s Army (VPA) 203rd Armored Regiment, received instructions from the North Vietnamese Ministry of Defence to reinforce the 304th Division as part of the Route 9-Khe Sanh Campaign. After an arduous journey down the Ho Chi Minh Trail in January 1968, the 198th Tank Battalion linked up with the 304th Division for a major offensive along Highway 9, which stretched from the Laotian border through to Quang Tri in South Vietnam. On January 23, the VPA 24th Regiment attacked the small Laotian outpost at Bane Houei Sane, under the control of the Royal Laos Army BV-33 ‘Elephant’ Battalion.