The phrase commonly associated with the aftermath of the Battle of Gettysburg is The high-water mark of the Confederacy.

This term refers to the moment during Pickett's Charge when the Confederate Army made its deepest advance into Northern territory. After this battle, the Confederacy faced numerous difficulties, marking a significant turning point in the Civil War. The phrase captures the peak of Confederate ambitions in the North, highlighting that Gettysburg was not only a significant defeat for the South but also a pivotal change in the war's momentum in favor of the Union.