John S. Heiser is an nineteen year veteran of the National Park Service and is presently a historian at Gettysburg National Military Park (NMP). He is well known in the Civil War community for his excellent maps that can be found in countless books.

Arnold Blumberg has been an attorney for the state of Maryland for twenty years. He has an abiding interest in cavalry in North American, particularly in the cavalry of the American Civil War in the eastern theater, a subject upon which he has contributed articles and essays to a number of Civil War and other journals.

D. Scott Hartwig is a Supervisory Park Historian at Gettysburg NMP. In 1993 he won the National Park Service's Freeman Tilden Award for excellence in Interpretation for the Mid-Atlantic Region. He has authored numerous essays, articles, and has published two books.

Bert H. Barnett is a park ranger/historian at Gettysburg NMP. His NPS experience also includes Shiloh NMP, Stones River National Battlefield, and Jefferson Expansion National Historic Site. He is the author of "Union Artillery on July 3," which appeared in Mr. Lincoln's Army: The Army of the Potomac in the Gettysburg Campaign, the published proceedings of Sixth Annual Gettysburg Seminar.

Troy D. Harman is an NPS veteran, having worked at Appomattox Court House National Historic Site, Fredericksburg-Spotsylvania National Military Park, and Independence National Historic Site. He is presently a park ranger/historian at Gettysburg NMP.

Eric A. Campbell is a park ranger/historian at Gettysburg NMP. He is a well-known author and public speaker. His first book, the edited letters of Charles Reed, a medal-of-honor winner who served with the 9th Massachusetts Battery, is forthcoming from Fordham Press.

Karlton D. Smith is a park ranger/historian at Gettysburg NMP. He is the author of "Pettigrew and Trimble: The Other Half of the Story," and "Honor-Duty-Courage: The Fifth Corps During the Gettysburg Campaign," which were published respectively in Unsung Heroes of Gettysburg in 1997, and Mr. Lincoln's Army: The Army of the Potomac in the Gettysburg Campaign, in 1998.