Order of Battle: Gettysburg, The Army of the Potomac, is a 9-volume series on the Union forces involved in the Gettysburg Campaign of 1863. Drawing from first-hand accounts, newspapers, original maps, photographs, monuments, battle stats, and commander biographies; the goal of the series is to provide Gettysburg buffs with everything you need to know about each regiment in the Army of the Potomac engaged and involved in the campaign. To walk on the actual ground and to read the accounts of the participants, is the best way to study the Battle of Gettysburg.
Volume VIII: The Twelfth Army Corps, offers an in-depth look at Major General Henry Slocum and the smallest Union corps at Gettysburg. Consisting of many battle-tested troops, the Twelfth Corps would gain fame as the heroes and defenders of Culp's Hill. Of all the Union corps in the battle, the Twelfth may have had the most success against their opponents, fighting mostly behind breastworks and fending off every enemy offensive on the crucial right flank of the Army of the Potomac. On each day of the battle, units of the corps were called upon to assist at vulnerable points in the battle lines.