Contrary to accepted myths, guerrilla tactics in the Civil War were not confined to the army of the Confederacy. In the fall of 1863, Union Colonel Carr B. White formed a group of scouts and sharpshooters, headed by Capt. Richard Blazer of the 91st Ohio Volunteer Infantry, to fight the bushwhackers in the mountains of West Virginia. The unit was so successful that Gen. George Crook mounted the group on horses in 1864 to combat rebel guerrillas,...