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 wounds were inconsistent with his known right-handedness. (Other native accounts note several soldiers committing suicide near the end of the battle.) Custer's body was found near the top of Custer Hill, which also came to be known as "Last Stand Hill". There the United States erected a tall memorial obelisk inscribed with the names of the 7th Cavalry's casualties. Several days after the battle, Curley, Custer's Crow scout who had left Custer near Medicine Tail Coulee (a drainage which led to the river), recounted the battle, reporting that Custer had attacked the village after attempting to cross the river.