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The following units can be upgraded to Cannon:

Strategy[]

Cannons can bombard enemy city fortifications. When attacking another unit, they cause collateral damage to other enemy units sharing the target's space.

Civilopedia entry[]

Closely following the invention of gunpowder, the development of the cannon caused a revolution in siege warfare. Invented by a German monk in the 14th century, early cannons used gunpowder charges to fire rocks or metal balls. The cannon forced a redesign of most fortifications because the straight, high walls surrounding most cities could be easily destroyed by direct fire. This was the fate of the walls of Constantinople, which had held against countless sieges for over a thousand years. The cannon quickly assumed an important role on the battlefield.

Civilization IV Units [edit]
Land Anti-TankB Archer (BowmanB Skirmisher) Artillery Axeman (Dog SoldierB Phalanx VultureB) Cannon Catapult (HwachaW) Cavalry (Cossack) Chariot (Immortal War Chariot) Crossbowman (Cho-Ko-Nu) CuirassierB (Conquistador) Explorer Grenadier Gunship Horse Archer (Keshik Numidian CavalryW) Infantry Knight (Camel Archer CataphractB) Longbowman Maceman (BerserkerW Samurai) Machine Gun Marine (Navy SEAL) Mechanized Infantry Mobile ArtilleryB Mobile SAMB Modern Armor Musketman (JanissaryW Musketeer Oromo WarriorB) ParatrooperB Pikeman (LandsknechtB) Rifleman (Redcoat) SAM Infantry Scout Spearman (HolkanB ImpiW) Swordsman (Gallic WarriorW Jaguar Praetorian) Tank (Panzer) TrebuchetW War Elephant (Ballista ElephantB) Warrior (Quechua)
Naval Attack SubmarineB Battleship Caravel (CarrackB) Carrier Destroyer Frigate Galleon (East IndiamanB) Galley Ironclad Missile CruiserB PrivateerB Ship of the LineB Stealth DestroyerB Submarine Transport TriremeW
Air AirshipB Bomber Fighter Guided MissileB ICBM Jet Fighter Stealth Bomber Tactical NukeB
Civilian Corporate ExecutiveB Missionary Settler Spy Work Boat Worker (Fast Worker)
Great People Great Artist Great Engineer Great GeneralW Great Merchant Great Prophet Great Scientist Great SpyB
W Added in Warlords B Added in Beyond the Sword


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