Gettysburg: A Novel of the Civil War
The story takes place in 1863 when Robert E. Lee and the Army of Northern Virginia are victorious at the Battle of Gettysburg instead of the United States. (Instead of attacking the Union line on July 2, 1863, Lee conducts a broad turning movement and forces the Army of the Potomac to attack him in a favorable position.) Gettysburg becomes something of a footnote in the main battle, which takes place at Union Mills in Maryland. The defeat at Union Mills is a grave setback to the United States, but it by no means spells the end of the war or determines its outcome, and the United States still has a lot of fight in it.
Retreat from Gettysburg
Although many descriptions of the Gettysburg Campaign end with Lee's crossing of the Potomac on July 13–14, the two armies did not take up positions across from each other on the Rappahannock River for almost two weeks and the official reports of the armies include the maneuvering and minor clashes along the way. On July 16 the cavalry brigades of Fitzhugh Lee and Chambliss held the fords on the Potomac at Shepherdstown to prevent crossing by the Federal infantry. The cavalry division under David Gregg approached the fords and the Confederates attacked them, but the Union cavalrymen held their position until dark before withdrawing. Meade called this a "spirited contest."