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 organization even while moving from point to point." Red Horse, an Oglala Sioux warrior, commented: "Here [Last Stand Hill] the soldiers made a desperate fight." One Hunkpapa Sioux warrior, Moving Robe, noted that "It was a hotly contested battle", while another, Iron Hawk, stated: "The Indians pressed and crowded right in around Custer Hill. But the soldiers weren't ready to die. We stood there a long time." In a letter from February 21, 1910, Private William Taylor, Company M, 7th Cavalry, wrote: "Reno proved incompetent and Benteen showed his indifference – I will not use the uglier words that have