A Civil War cannon sits on Lookout Mountain, overlooking the Tennessee River and the City of Chattanooga, Tennessee. The cannon battery pictured was used by the Confederate Army to bombard Union supply trains, and troops. General Ulysses S. Grant was ultimately able to defeat the Confederate troops stationed here in the Battles of Lookout Mountain and Missionary Ridge, which freed Chattanooga from a months long siege, and opened up the South to the advancing Union Army.