Battle of the Badlands

The Battle of the Badlands was fought in Dakota Territory, in what is now western North Dakota, between the United States army led by Brigadier general Alfred Sully and the Lakota, Yanktonai, and the Dakota Indian tribes. The battle was fought August 7–9, 1864 between what are now Medora and Sentinel Butte, North Dakota.
Results.
Alfred Sully estimated around 100 Native American warriors were killed in battle, this may have been an exaggeration due to range. Only 3 US soldiers were killed in the battle, along with an additional 10 wounded.