The term "280 mm artillery" generally refers to a type of large-caliber artillery piece that fires 280 mm (approximately 11 inches) projectiles. One of the most notable examples of 280 mm artillery is the **M65 atomic cannon**, which was developed by the United States in the early Cold War period. The M65 was designed to be capable of firing nuclear projectiles, making it a significant part of the U.S.
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