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 in 1876, the Lakota and the Cheyenne held a Sun Dance that was also attended by a number of "Agency Indians" who had slipped away from their reservations. During a Sun Dance around June 5, 1876, on Rosebud Creek in Montana, Sitting Bull, the spiritual leader of the Hunkpapa Lakota, reportedly had a vision of "soldiers falling into his camp like grasshoppers from the sky." At the same time US military officials were conducting a summer campaign to force the Lakota and the Cheyenne back to their reservations, using infantry and cavalry in a so-called "three-pronged approach". Col. John Gibbon's