Battle of Chustenahlah
1861 CE.
Shown on the map at 36.388°, -96.075°.
The Battle of Chustenahlah was fought in Osage County, Oklahoma, (then Indian Territory) on December 26, 1861, during the American Civil War. A band of 9,000 pro-Union Native Americans was forced to flee to Kansas in bitter cold and snow in what became known as the Trail of Blood on Ice.
Text from the Wikipedia article Battle of Chustenahlah, licensed CC BY-SA 4.0.