This is the untold story of the heroic efforts of the men of the 4th United States Cavalry as they sabered their way through the Western Theater of the Civil War and into the heart of the Confederacy. From the earliest battles in Missouri at Dug Springs and Wilson's Creek, to Fort Donelson and Shiloh, Tennessee, and on to the great Battle of Chickamauga Creek, Georgia, where they delayed the advance of the Confederate Army for ten hours at Reed's Bridge, the regiment not only fought on Southern soil, but faced the best cavalry leaders the Confederacy had to offer, including Nathan Bedford Forrest. From the siege of Atlanta and Kilpatrick's Raid around the city, to the final great cavalry charge at Selma, Alabama, the 4th United States earned a reputation second to none as they became the Masters of the Field.