Civil War buffs and scholars quickly recognize the dates of September 16-18, 1862 as the period marking the bloodiest battle of the entire campaign--Antietam. But until now, the ten days prior to that event have remained in relative obscurity. In Before Antietem, John Michael Priest offers the first book-length, tactical exploration of the Maryland campaign and the Battles of South Mountain, describing the decisive events leading up to the famous...