Leading elements of the Confederate Army of Northern Virginia reach the Potomac River at Williamsport, Maryland, but they soon find the bridges destroyed and the river too high to ford. And the Federal Army of the Potomac is in pursuit.

Exploring the most important 55 months in American history
Leading elements of the Confederate Army of Northern Virginia reach the Potomac River at Williamsport, Maryland, but they soon find the bridges destroyed and the river too high to ford. And the Federal Army of the Potomac is in pursuit.
The Federal and Confederate armies gather south of Gettysburg, where Robert E. Lee launches ferocious attacks on both Federal flanks.
Thomas J. “Stonewall” Jackson’s Confederates attack the unsuspecting Federal right flank, but Jackson is seriously wounded in the aftermath.
Joseph Hooker works to reorganize and revitalize the demoralized Federal Army of the Potomac.
March 23, 1864 – Lieutenant General Ulysses S. Grant took up headquarters with the Army of the Potomac in northern Virginia, which was undergoing a