In enemy warfare, artillery has proven to be a critical component in success on the battlefield. In the Middle Ages, cannons became standardized, and more effective in both the anti-infantry and siege roles. Cannons also revolutionized naval warfare. The Royal Navy, in particular, took advantage of cannons in their firepower. Our Historic Military Artillery Brass Warfare Cannon Keychain is a replicated cannon that comes on brass chain with a screw lock carabiner. This keychain is great for storing and keeping all your keys in one place.