 At Khe Sanh Combat Base, about east of Lang Vei, the U.S. 26th Marine Regiment was able to hold their ground against a multi-division PAVN assault.During the siege U.S. Air Force (USAF), Navy, and Marine fighter-bombers dropped 40,000 tonnes of bombs on PAVN positions, while B-52 bombers dropped more than 60,000 tonnes of ordnance on areas where the PAVN were believed to have concentrated their forces.In the same period, the PAVN 2nd Division under the command of General Giáp Văn Cương clashed with elements of the 1st Marine Division, the Americal Division, and the South Korean Marine Brigade in their attempts to capture Đà Nẵng.