Reva, South Dakota Reva, South Dakota Reva is an unincorporated community in Harding County, South Dakota, United States. Although not tracked by the Census Bureau, Reva has been assigned the ZIP code of 57651. The community has the name of Reva Bonniwell, the daughter of a first settler. The Battle of Slim Buttes occurred here on September 9–10, 1876, in the Great Sioux Reservation between the United States Army and Miniconjou Sioux during the Great Sioux War of 1876. It marked the first significant victory for the Army since the stunning defeat of General George Custer at the Battle of Little Bighorn in
Little Bighorn Battlefield National Monument the Sans Arc Lakota warrior Long Road and the Minniconjou Lakota Dog's Back Bone. On June 25, 2003, an "unknown Lakota warrior marker" was placed on Wooden Leg Hill, east of Last Stand Hill to honor a warrior who was killed during the battle, as witnessed and reported by the Northern Cheyenne warrior Wooden Leg. The battlefield is the final resting place of the western historian and author Stanley Vestal, a professor at the University of Oklahoma. Little Bighorn Battlefield National Monument Little Bighorn Battlefield National Monument preserves the site of the June 25 and 26, 1876, Battle of the