Heavy Cannon
Heavy Cannon Icon
First appearanceAge of Empires III
Cost200 woodResources wood
500 coinIcon coin
AgeAges industrial Industrial Age
Base hit points475
Pop. use7
Speed3.5 (Limber)
1.4 (Bombard)
Line of Sight32
Resists75% vs. Ranged
Siege damage200
Siege multipliersx3.0 vs. Infantry
x2.0 vs. Buildings
x3.0 vs. Ships
x0.75 vs. Artillery
x0.5 vs. Arrow Knight
Siege range28
Siege Area of Effect4
Rate of Fire6.0
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The Heavy Cannon is a heavy artillery unit featured in Age of Empires III. It is produced at the Factory (see Hidden Cost below) and can be shipped from the Home City.

Overview Edit

The Heavy Cannon is the typical heavy artillery piece for the Spanish, Portuguese, Germans, Russians, Dutch and French. The Heavy Cannon is also available to these same civilizations from their Home City shipments (2 Heavy Cannon), most notably the Russians who can send a total of four cannons thanks to the Tsar Cannon card.

The Heavy Cannon's power and hit points are similar to the Great Bombard, but the rate of fire is slightly faster and it has no penalties versus Cavalry. The Heavy Cannon is effective against enemy infantry and artillery units, Spanish cannons using Unction are also effective versus Cavalry and other Artillery due to high damage and lack of significant penalties. Overall, a Heavy Cannon (1 on 1 and lacking Unction) would have a good chance to beat a Great Bombard with full health, though it would rely on the Heavy Cannon getting two shots off (12 seconds) before the Bombard began attacking the Heavy Cannon. This is realistically possible due to the Heavy Cannon's smaller penalty versus other artillery and its greater rate of fire. Other common factors such as battlefield confusion, varying levels of micromanagement skill and line of sight advantages allow this scenario to occur frequently. The population cost of this unit is 7.


Other upgrades can be done in Arsenal or from shipments.

Imperial CannonEdit

Imperial Cannon is the first upgrade for the Heavy Cannon. It is available for 1500 wood and 1500 coin once Imperial Age is reached.

Hit Points: +50% (712)
Bombard Attack: +50% (300)

Hidden Cost Edit

Training these units at a factory requires 115 seconds, 109.25 with Team Engineering School sent by a Chinese ally (for civilizations without Engineering School), 103.5 with Engineering School and finally 97.75 with both Home City Cards. The average resource gather rate of a Factory is 5.5 every second (before the building upgrade (+20%) and Home City Card, Market, etc. upgrades). This means that Heavy Artillery from a Factory, while appearing to be free, will have a cost dependent upon how effective the factory gathers a needed resource. In many cases, this cost can exceed the base value (700 resources) of the unit.

Shipments Edit


"The logistics of moving, maintaining, positioning, aiming, and firing artillery required a highly drilled and disciplined team with a sharp commander. In addition to the men and artillery pieces in his command, an artillery officer had to see to the horses used to haul the pieces around - sometimes up to six for heavier guns. When one side in a battle could field hundreds of artillery pieces, the logistics of just moving them into position were taxing. "Heavy Cannon" is a relative term, but in general, cannon considered 'heavy' were typically used as permanent gun emplacements to defend Forts and strategic locations."