In April 1861, as the Civil War began, Samuel Harris Sims of Brooklyn enlisted in the 13th New York State Militia to fight for the Union. Discharged, he almost immediately re-enlisted in the 51st New York Volunteers, recruiting and commanding its Company G. For the next three years, Sims led his men into some of the major battles of the war. All the while he exchanged letters with family, friends, as well as his fianc?e, Carrie Dayton, to whom he...