sentences:  At midday the Marines were ordered to withdraw to defend Bien Hoa and Long Binh.Brigadier General Trần Quang Khôi, commander of the 3rd Armored was given responsibility for defending Bien Hoa, although PAVN shelling had rendered the base unusable.Seeing the regular forces leaving Hố Nai the PAVN renewed their assault at midnight on 30 April, but the town's Popular Forces fought back and were not subdued until dawn.