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 (including John Martin (Giovanni Martino)) that had left that column before the battle; one Crow scout, Curly, was the only survivor to leave after the battle had begun), although for years rumors persisted of other survivors. Over 120 men and women would come forward over the course of the next 70 years claiming they were "the lone survivor" of Custer's Last Stand. The phenomenon became so widespread that one historian remarked, "Had Custer had all of those who claimed to be 'the lone survivor' of his two battalions he would have had at least a brigade behind him when he