is a retired historian for the U.S. Department of Defense and the award-winning author of numerous books on the Civil War, including Fitz Lee: A Military Biography of Major General Fitzhugh Lee, C.S.A. (Bison Books, 2010), The Sharpshooters: A History of the Ninth New Jersey Volunteer Infantry in the Civil War (Potomac Books, 2017), and The Early Morning of War: Bull Run, 1861.
