 In the early morning hours of 30 March 1972 devasting PAVN rocket, mortar and artillery fire fell on every ARVN fire support base in Quảng Trị Province.The bombardment continued all day, and late in the day the northernmost bases reported PAVN tanks and infantry moving south across the Vietnamese Demilitarized Zone (DMZ).The artillery offensive was followed by infantry and armor attacks in the east across the Ben Hai River following the axis of Route 1 in the west toward the district capital of Cam Lộ and Camp Carroll.