Around here (SE Tennessee) folks hunt Civil War relics with metal detectors. There was a battle that occurred not far from me called "Wheelers Raid" where Confederates ambushed a 1300 wagon Union wagon train as it was making it's way over Signal Mountain towards Chattanooga. People are still finding miniballs, belt buckles and buttons, occasionally cannon balls and cartridges, horse tack, etc. Indian artifacts, i.e., projectile points, gaming stones, drills, etc, are found fairly common here, too.
Around here (SE Tennessee) folks hunt Civil War relics with metal detectors.
Now that does sound like a cool thing to do. Not much Civil War stuff to find here in the Pacific Northwest.