Gettysburg Campaign

After stunning victories at Fredericksburg and Chancellorsville, Virginia early in May 1863, Confederate Gen. Robert E. Lee carried the war through Maryland, across the Mason-Dixon Line and into Pennsylvania. His infantry marched north through the Shenandoah Valley and western Maryland as his cavalry, led by Gen. J.E.B. Stuart, harassed Union supply lines to the east. Union Gen. Joseph Hooker, replaced on June 28 by Gen. George G. Meade, led the Army of the Potomac from the Washington defenses in pursuit. The Federals collided with Lee's Army of Northern Virginia at Gettysburg, Pennsylvania on July 1, starting a battle neither side had intended to fight there. Three days later, the defeated Confederates began retreating through Maryland, retracing their steps to the Potomac River and crossing into Virginia on July 14.

Maryland · United States