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 on the bluffs. Yates' wing, descending to the Little Bighorn River at Ford D, encountered "light resistance", undetected by the Indian forces ascending the bluffs east of the village. Custer was almost within "striking distance of the refugees" before being repulsed by Indian defenders and forced back to Custer Ridge. The "Lone Teepee" (or "Tipi") was a landmark along the 7th Cavalry's march. It was where the Indian encampment had been a week earlier, during the Battle of the Rosebud on June 17, 1876. The Indians had left a single teepee standing (some reports mention a second that had been