While his fellow, newly promoted division commander Brig. Gen. John Buford was initiating the Battle of Gettysburg on July 1, 1863, Gregg was still moving north.
Mens hans kollega, nyforfremmede divisionskommandant generalmajor John Buford indledte slaget ved Gettysburg den 1. juli 1863, var Gregg fortsat på vej nordpå.