Battle of Slim Buttes
1876 CE.
Shown on the map at 45.543°, -103.125°.
The Battle of Slim Buttes was fought 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 June.
Text from the Wikipedia article Battle of Slim Buttes, licensed CC BY-SA 4.0.