William Cross Hazelton spent four years as a brave and devoted member of the Union cavalry in the Civil War. During that time he corresponded with Fannie Morrill, the young woman who would become his fiancée and eventually his wife. His letters describe the life of an Illinois volunteer in the Army of the Potomac, the military unit that fought Lee's Army of Northern Virginia in most of the big battles of the Civil War: Williamsburg, Richmond, Antietam, Fredericksburg, Chancellorsville, and Gettysburg. Hazelton describes the battles from the viewpoint of an ordinary cavalryman slogging through the mud, following erratic orders, surviving for days on enemy turf eating nothing but hardtack, and wondering why the Union army, though superior in numbers and supplies, kept losing battles. After Lee surrendered and Lincoln was assassinated, Hazelton became part of the cavalry posse that chased John Wilkes Booth across the Potomac. His letters breathe new life into a war so devastating that it still scars the American psyche, while exhibiting a moral perspective far ahead of its time.