 A 75 mm recoilless rifle knocked out one of the supporting tanks.By the end of the day, the Marines had sustained two dead and 34 wounded and claimed to have killed nearly 140 PAVN-VC.That night the PAVN 815th Battalion overran the ARVN defenders at the Thua Thien Prison releasing the 2,500 prisoners, including 350 VC who were soon armed with captured ARVN weapons and joined the fighting.