Rodes initially sent three brigades south against Union troops that represented the right flank of the I Corps and the left flank of the XI Corps: from east to west, Brig. Gen. George P. Doles, Col. Edward A. O'Neal, and Brig. Gen. Alfred Iverson. Doles's Georgia brigade stood guarding the flank, awaiting the arrival of Early's division. Both O'Neal's and Iverson's attacks fared poorly against the six veteran regiments in the brigade of Brig. Gen. Henry Baxter, manning a line in a shallow inverted V, facing north on the ridge behind the Mummasburg Road. O'Neal's men were sent forward without coordinating with Iverson on their flank and fell back under heavy fire from the I Corps troops.
Iverson failed to perform even a rudimentary reconnaissance and sent his men forward blindly while he stayed in the rear (as had O'Neal, minutes earlier). More of Baxter's men were concealed in woods behind a stone wall and rose to fire withering volleys from less than 100 yards (91 m) away, creating over 800 casualties among the 1,350 North Carolinians. Stories are told about groups of dead bodies lying in almost parade-ground formations, heels of their boots perfectly aligned. (The bodies were later buried on the scene, and this area is today known as "Iverson's Pits", source of many local tales of supernatural phenomena.)
Baxter's brigade was worn down and out of ammunition. At 3:00 p.m. he withdrew his brigade, and Gen. Robinson replaced it with the brigade of Brig. Gen. Gabriel R. Paul. Rodes then committed his two reserve brigades: Brig. Gens. Junius Daniel and Dodson Ramseur. Ramseur attacked first, but Paul's brigade held its crucial position. Paul had a bullet go in one temple and out the other, blinding him permanently (he survived the wound and lived 20 more years after the battle). Before the end of the day, three other commanders of that brigade were wounded.
Daniel's North Carolina brigade then attempted to break the I Corps line to the southwest along the Chambersburg Pike. They ran into stiff resistance from Col. Roy Stone's Pennsylvania "Bucktail Brigade" in the same area around the railroad cut as the morning's battle. Fierce fighting eventually ground to a standstill.