On the morning of 30 April the 18th Division and Marines were ordered to retreat from Long Binh to the west bank of the Đồng Nai river, while the ARVN 81st Rangers held Bien Hoa Air Base and the 3rd Armored held Bien Hoa. The 3rd Armored was moving from Bien Hoa to attack PAVN forces when they heard the surrender broadcast of President Dương Văn Minh and BG Khôi halted his advance and disbanded the unit. The 81st Rangers had abandoned the base and had moved west of the Đồng Nai river when they heard the surrender broadcast and then marched towards Saigon to surrender to the PAVN.
