The Battle of Round Mountain was the first battle in the Trail of Blood on Ice campaign for the control of Indian Territory during the American Civil War and occurred on November 19, 1861. The physical location of the battle is in dispute. Some historians believe it to be near Keystone while others contend that it is near Yale, Oklahoma The following morning, Cooper advanced on Opothleyahola’s new camp but found that the Federal forces had fled. The Confederates claimed victory because Chief Opothleyahola had left the area.