The story of John A. Logan s famed 31st Regiment Illinois Volunteers, told by three veterans, follows the regiment from the battles of Belmont, Fort Donelson, Vicksburg, Kenesaw Mountain, and Atlanta through the March to the Sea and into North Carolina. "Few regiments," notes historian John Y. Simon in the foreword, "fought longer or more fiercely, suffered more casualties, or won more victories."

Logan proved a valiant and valuable Union commander, yet when the Civil War first began, it was far from clear whether he would lead Union or Confederate troops. In dramatic fashion, however,...