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 Cut Knife acting as Director of Internment Camps in World War I. Many people have compared this battle to the Battle of the Little Bighorn. There are some major similarities: in both cases, an army officer disobeyed orders; both tried to catch a native camp by surprise; both Custer and Otter badly misjudged the terrain and had to slow down their attacks; and both ended up being surrounded by warriors and had no idea where to charge. Otter, at least, knew when to retreat (and was allowed to do so), while Custer kept fighting and suffered hundreds of casualties. Of course, the