In April and May 1967 The Hill Fights on Hills 861, 881 North and 881 South around Khe Sanh Combat Base between the 2/9 Marines and PAVN occurred. In January 1968, Khe Sanh came under heavy attack in what is known as the Battle of Khe Sanh. The main objective of the PAVN was to draw off American troops into the countryside in preparation for the Tet Offensive. Despite being outnumbered, 2/9 Marines, the 26th Marine Regiment and Army of the Republic of Vietnam forces held their ground and the PAVN were driven off of the area around after experiencing heavy casualties by heavy aerial bombardment.