The second day's fighting at Gettysburg - the assault of the Army of Northern Virginia against the Army of the Potomac on 2nd July 1863 - was probably the critical engagement of that decisive battle. In this definitive account, Harry Pfanz introduces the men and the units, examines the development of tactical plans and the deployment of troops, and discusses the roles played by the commanders' key subordinates, whose conduct has been the source of controversy. His emphasis, though, is on the battle itself.