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 partially dismantled), and in it was the body of a Sans Arc warrior, Old She-Bear, who had been wounded in the battle. He had died a couple of days after the Rosebud battle, and it was the custom of the Indians to move camp when a warrior died and leave the body with its possessions. The Lone Teepee was an important location during the Battle of the Little Bighorn for several reasons, including: The first group to attack was Major Reno's second detachment (Companies A, G and M) after receiving orders from Custer written out by Lt. William W. Cooke,