 Subsequently, on 4 May 1968, the Americal Division made amendments to their "Golden Valley Plan", the plan for the relief and reinforcement of CIDG camps, to enable the deployment of the 1st Battalion, 46th Infantry Regiment, 196th Light Infantry Brigade to support Khâm Đức.To counter a possible major PAVN attack, the U.S. military began taking steps to reinforce Khâm Đức.Starting on 9 April, the U.S. 70th Engineer Battalion was flown in from Pleiku, about to the south, to repair and upgrade the airfield for sustained use by C-130 Hercules transport aircraft.