Cannon, the artillery class unit in late middle ages, is unlocked after having researched Gunpowder technology. Requires Cannon Camp. Having low attack and a balanced defense (if using dug in )value, but the longest attack range among Late Middle Ages units (however, Trebuchet has longer attack range, beware!), it is effective against Heavy Unit. The Dug In Bonus makes it much more effective against Ranged Units / Artillery Units attackers.