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 Gall's version of events, as recounted to Lt. Edward Settle Godfrey, Custer did not attempt to ford the river and the nearest that he came to the river or village was his final position on the ridge. Chief Gall's statements were corroborated by other Indians, notably the wife of Spotted Horn Bull. Given that no bodies of men or horses were found anywhere near the ford, Godfrey himself concluded "that Custer did not go to the ford with any body of men". Cheyenne oral tradition credits Buffalo Calf Road Woman with striking the blow that knocked Custer off his horse