On the second day, heavy fighting on the Union left demanded reinforcements and Geary was ordered to leave a single brigade, under George S. Greene, on Culp's Hill and follow another division, which was just departing.
Reinforcements and Geary was ordered to leave a single brigade on Culp's Hill and follow another division. This was under George S. Greene. This was what heavy fighting on the Union left demanded on the second day. Another division was just departing.