Battle of Killdeer Mountain

The Battle of Killdeer Mountain (also known as the Battle of Tahkahokuty Mountain) took place during Brigadier General Alfred Sully's expedition against the Sioux Indians in Dakota Territory July 28–29, 1864. The location of the battleground is in modern Dunn County, North Dakota.
Results.
Around 100 Native American warriors were killed in the conflict, whilst only 2 of Alfred Sully's were killed.