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 engage noncombatants at the encampments on the Little Bighorn so as to capture women, children, and the elderly or disabled to serve as hostages to convince the warriors to surrender and comply with federal orders to relocate. Custer's battalions were poised to "ride into the camp and secure noncombatant hostages" and "forc[e] the warriors to surrender". Author Evan S. Connell observed that if Custer could occupy the village before widespread resistance developed, the Sioux and Cheyenne warriors "would be obliged to surrender, because if they started to fight, they would be shooting their own families." In Custer's book "My Life