 Complete the following phrase:  After the battle, Hills corps was the first to start the Confederate retreat back to Virginia. Heths division served as the rear guard as the army marched over the Potomac on July 14th; during the Battle of Falling Waters, Pettigrew was mortally wounded during a Union cavalry charge. During the fall, Cadmus Wilcox was promoted to major general and given command of Penders former division. In the 