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 first looked down on the village from the Crow's Nest across the Little Bighorn River, they could only see the herd of ponies. Looking from a hill away after parting with Reno's command, Custer could observe only women preparing for the day, and young boys taking thousands of horses out to graze south of the village. Custer's Crow scouts told him it was the largest native village they had ever seen. When the scouts began changing back into their native dress right before the battle, Custer released them from his command. While the village was enormous in size, Custer thought