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 the northeast, causing a breakdown in the command structure and panic among the troops. Many of these men threw down their weapons while Cheyenne and Sioux warriors rode them down, "counting coup" with lances, coup sticks, and quirts. Some Native accounts recalled this segment of the fight as a "buffalo run." Captain Frederick Benteen, battalion leader of Companies D, H and K, recalled his observations on the Custer battlefield on June 27, 1876 A Brulé Sioux warrior stated: "In fact, Hollow Horn Bear believed that the troops were in good order at the start of the fight, and kept their