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 construed. The troops evidently died in several groups, including on Custer Hill, around Captain Myles Keogh, and strung out towards the Little Bighorn River. Modern documentaries suggest that there may not have been a "Last Stand" as traditionally portrayed in popular culture. Instead, archaeologists suggest that, in the end, Custer's troops were not surrounded but rather overwhelmed by a single charge. This scenario corresponds to several Indian accounts stating Crazy Horse's charge swarmed the resistance, with the surviving soldiers fleeing in panic. Many of these troopers may have ended up in a deep ravine 300–400 yards away from what is