 Due to the strong presence of PAVN artillery, ARVN artillery units at Don Luan were simply overwhelmed.In addition, the high calibre anti-aircraft guns used by the PAVN 20th Air-Defence Battalion also limited the effectiveness of the RVNAF air support.At 10.30am all ARVN units at Đôn Luân capitulated and Major Đặng Vũ Khoái, commander of the 352nd Security Battalion, was captured at Suoi Rat along with his junior officers.