Summit Springs Battlefield is located in Colorado

The Battle of Summit Springs, on July 11, 1869, was an armed conflict between elements of the United States Army under the command of Colonel Eugene A. Carr and a group of Cheyenne Dog Soldiers led by Tall Bull, who was killed during the engagement. The US forces were assigned to retaliate for a series of raids in north-central Kansas by Chief Tall Bull's Dog Soldiers band of the Cheyenne. The battle happened south of Sterling, Colorado in Washington County near the Logan/Washington county line.

• http://en.wikipedia.org/wiki/Battle of Summit Springs