...he Round Tops, and, if practicable, to attack the Confederate flank and rear. Late on July 3, 1863, the reserve cavalry Brigade under Merritt moved up and took position to the left of Kilpatrick. Custer 's brigade had been detached to report to Gregg on the Union right. The fight which ensued on this third and last day of the great battle, was severe in the extreme. Merritt's position on the le...