Rodes's original faulty attack at 2:00 had stalled, but he launched his reserve brigade, under Ramseur, against Paul's Brigade in the salient on the Mummasburg Road, with Doles's Brigade against the left flank of the XI Corps. Daniel's Brigade resumed its attack, now to the east against Baxter on Oak Ridge. This time Rodes was more successful, mostly because Early coordinated an attack on his flank.^[42]

In the west, the Union troops had fallen back to the Seminary and built hasty breastworks running 600 yards (550 m) north-south before the western face of Schmucker Hall, bolstered by 20 guns of Wainwright's battalion. Dorsey Pender's division of Hill's Corps stepped through the exhausted lines of Heth's men at about 4:00 p.m. to finish off the I Corps survivors. The brigade of Brig. Gen. Alfred M. Scales attacked first, on the northern flank. His five regiments of 1,400 North Carolinians were virtually annihilated in one of the fiercest artillery barrages of the war, rivaling Pickett's Charge to come, but on a more concentrated scale. Twenty guns spaced only 5 yards (4.6 m) apart fired spherical case, explosive shells, canister, and double canister rounds into the approaching brigade, which emerged from the fight with only 500 men standing and a single lieutenant in command. Scales wrote afterwards that he found "only a squad here and there marked the place where regiments had rested."^[43]

The attack continued in the southern-central area, where Col. Abner M. Perrin ordered his South Carolina brigade (four regiments of 1,500 men) to advance rapidly without pausing to fire. Perrin was prominently on horseback leading his men but miraculously was untouched. He directed his men to a weak point in the breastworks on the Union left, a 50-yard (46 m) gap between Biddle's left-hand regiment, the 121st Pennsylvania, and Gamble's cavalrymen, attempting to guard the flank. They broke through, enveloping the Union line and rolling it up to the north as Scales's men continued to pin down the right flank.