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 total US casualty count included 268 dead and 55 severely wounded (six died later from their wounds), including four Crow Indian scouts and at least two Arikara Indian scouts. Public response to the Great Sioux War varied in the immediate aftermath of the battle. Custer's widow (Libbie Custer) soon worked to burnish her husband's memory, and during the following decades Custer and his troops came to be considered iconic, even heroic, figures in American history. The battle, and Custer's actions in particular, have been studied extensively by historians. Little Bighorn Battlefield National Monument honors those who fought on both sides.