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
Battle of the Little Bighorn often been in my mind. Both failed Custer and he had to fight it out alone." Recent archaeological work at the battlefield indicates that officers on Custer Hill restored some tactical control. E Company rushed off Custer Hill toward the Little Bighorn River but failed to reach it, which resulted in the total destruction of that company. This left about 50-60 men, mostly from F Company and the staff, on Last Stand Hill. The remainder of the battle took on the nature of a running fight. Modern archaeology and historical Indian accounts indicate that Custer's force may have been divided