 In the final assault on 10 March 1968, elements of the PAVN 41st Special Forces Battalion attacked the facility, with support from the VPA 766th Regiment and one Pathet Lao battalion.The Hmong and Thai forces defending the facility were overwhelmed by the combined PAVN and Pathet Lao forces.Phou Pha Thi is a remote mountain in Houaphanh Province, northeastern Laos.