Federal cavalry defeat the rearguard of Lee's army at Falling Waters but the main force escapes

Most of the Army of Northern Virginia had finally been able to retreat across the flooded Potomac the night before, but elements of General Kilpatrick's Union cavalry closed on the last of the rearguard holding the crossing near Falling Waters, Maryland.  General George Custer's brigade overan the Confederates, captured more than 500 prisoners, and mortally wounded Confederate General J.J. Pettigrew, a survivor of Pickett's Charge ten days before.  Pettigrew died near Bunker Hill, West Virginia three days later.  (By John Osborne)