Battle of the Rosebud
1876 CE.
Shown on the map at 45.223°, -106.998°.
The Battle of the Rosebud or the Battle of Rosebud Creek took place on June 17, 1876, in the Montana Territory between the United States Army and its Crow and Shoshoni allies against a force consisting primarily of Lakota Sioux and Northern Cheyenne Indians during the Great Sioux War of 1876. The Cheyenne called it the Battle Where the Girl Saved Her Brother because of an incident during the fight involving Buffalo Calf Road Woman. General George Crook's offensive was stymied by the Indians, led by Crazy Horse, and he awaited reinforcements before resuming the campaign in August.
Text from the Wikipedia article Battle of the Rosebud, licensed CC BY-SA 4.0.