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.
Columbia, Pennsylvania
With the Union Army of the Potomac hastening northward into Maryland and Pennsylvania, Robert E. Lee ordered his widely scattered forces to withdraw to Heidlersburg and Cashtown (not far from Gettysburg) to rendezvous with other contingents of the Confederate Army. The burning of the Columbia-Wrightsville Bridge thwarted one of Lee's goals for the invasion of Pennsylvania, and General Gordon later claimed the skirmish at Wrightsville reinforced the erroneous Confederate belief that the only defensive forces on hand were inefficient local militia, an attitude that carried over to the first day of the Battle of Gettysburg.