Fightin Joe Hooker, the cowboy riding fence says he rode with Joseph Hooker when he led the Army of the Cumberland at the battle of Lookout Mountain during the Civil War. General Joseph Hooker did not lead the Army of the Cumberland. He was in command of the XI and XII Corps of the Army of the Potomac and was sent west to reinforce the Army of the Cumberland, which was under the command of general George H. Thomas at the battle of Chattanooga, of which the battle of Lookout Mountain was part.