Reva is an unincorporated community in Harding County, South Dakota, United States.

It marked the first significant victory for the Army since the stunning defeat of General George Custer at the Battle of Little Bighorn in June.

One hundred fifty troopers led by Captain Anson Mills from the 3rd U.S. Cavalry surrounded the village of thirty-seven lodges and attacked it the next morning, shooting anyone who resisted.

Having refused treatment by the army surgeons after surrendering, American Horse eventually lost his life, as well as two women and one child.

Those Sioux who escaped spread the word to neighboring Sans Arc, Brulé and Cheyenne villages, telling Crazy Horse and other leaders that they had encountered 100-150 soldiers.