On 2 April, after several days of shelling and surrounded by a PAVN regiment Colonel Pham Van Dinh, commander of the 56th Regiment, surrendered Camp Caroll and his 1,500 troops with barely a shot being fired.[1]: 29–30 With the loss of camp Carroll the 147th Marine Brigade abandoned Mai Loc, the last western base and fell back to Quang Tri and then to Huế, the brigade was replaced by the fresh 369th Marine Brigade which established a new defensive line at Firebase Nancy.[2]: 30 The capture of Camp Carroll and Mai Loc allowed PAVN forces to cross the Cam Lộ bridge, 11 km to the west of Đông Hà. The PAVN then had almost unrestricted access to western Quảng Trị Province north of the Thạch Hãn River.