Meanwhile, the ARVN 39th Ranger Battalion secured their objective on Mount Chop Non, with the main formation of the VC 45th Battalion lining their troops on the rear positions of the ARVN Rangers. At 2:05 pm the VC unleashed their ambush on the ARVN 2nd Battalion, forcing the ARVN infantrymen to fight for their lives. As fighting erupted on Mount Ma To, the ARVN 3rd Marine Battalion inside the village of Phuoc Loc was ordered to relieve the 2nd Battalion. However, by 3:30 pm the 3rd Marine Battalion was also surrounded by the VC 60th Battalion on Hill 47, which had moved out from Vinh Loc village to engage the Marines. At the same time, VC mortar fire began slamming into South Vietnamese positions in the village of Phuoc Loc, and fighting continued until 5 pm. When it concluded that evening both sides had suffered heavy casualties and the South Vietnamese 2nd Battalion and the 3rd Marine Battalion were forced to retreat back to Phuoc Loc with four M-113 APCs providing fire support.