The Atomic Cannon, at 280 mm, was the largest nuclear capable mobile artillery piece manufactured by the United States. On May 25, 1953, a 280 mm cannon fired an atomic projectile a distance of 7 miles at the Nevada Test Site. Twenty 280 mm cannons were manufactured. None were used in battle.
Disclaimer: The appearance of U.S. Department of Defense (DoD) visual information on this website does not imply or constitute DoD endorsement.