From the record
“The Bates Battlefield was the scene of an 1874 action in which an Arapaho encampment was attacked by U.S. The battlefield is a narrow valley in Hot Springs County, Wyoming, near the junction of the Big Horn Mountains and the Owl Creek Mountains.”
Wikipedia article Bates Battlefield, CC BY-SA 4.0.
One of 12 National Register listings published here for Hot Springs County · listed in 1974 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service