Video: Explore Fort Granger in Franklin, Tennessee

Sparing no effort, the U.S. Army outfitted Fort Granger with powerful siege guns, field artillery, a powder magazine for 1,200 artillery rounds and a storehouse for 70,000 rations. “The strongest and finest fortifications in the department of the Cumberland,” an observer wrote. Union bigwigs named the fort for Maj. Gen. Gordon Granger, a career U.S. Army officer, who, in 1863, delighted visitors by firing two shots from its monster Parrot gun into a tree a mile away.