The Federal and Confederate armies gather south of Gettysburg, where Robert E. Lee launches ferocious attacks on both Federal flanks.
Exploring the most important 55 months in American history
The Federal and Confederate armies gather south of Gettysburg, where Robert E. Lee launches ferocious attacks on both Federal flanks.
Advance elements of the Federal and Confederate armies clash in southern Pennsylvania, beginning what would grow into the most terrible battle in American history.
Cavalry from the Federal Army of the Potomac arrive at Gettysburg from the south, just as infantry from the Confederate Army of Northern Virginia leave to the north.
Robert E. Lee is shocked to learn that the Federal army has crossed the Potomac River and orders his Confederate army to concentrate. Officials at Washington cautiously wait to see if George G. Meade is up to the task of commanding the Federal army at this crucial time.
President Abraham Lincoln accepts Joseph Hooker’s resignation as Army of the Potomac commander, daringly replacing an army commander during an enemy invasion.
Robert E. Lee warns his Confederates against pillaging in Pennsylvania, while Joseph Hooker makes another request to take over the Federal garrisons in the Shenandoah Valley.