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Monitor. Mortar ship good at bombarding buildings at great range.
—In-game description

The Monitor is a military naval vessel in Age of Empires III that can be trained at the Dock once the Industrial Age is reached.

Monitors are available to European and Asian civilizations except the Knights of St. John (Act I: Blood campaign).

Overview[]

The Monitor has a mortar fixed on the front for bombarding beaches or fortifications, but is weak against other ships and anti-ship units. It has an ability where it fires a more powerful shot that covers more range. The Monitor is most effective against buildings, as it deals 10 times as much damage against them compared to units. Any building that is deemed a threat can also be targeted; however, they are essential for destroying shore defences such as Forts. Monitors are resistant to building fire due to being classified as a siege unit; Outposts and Town Centers do half their damage against them. This marks a power swing towards invading navies and away from the shore defender starting in the Industrial Age.

Monitors are expensive, but may be acquired via the TEAM Monitor cards. If sending the 2 Monitor Card, be careful with the unit limit, as training any (without Admiralty) will make the total after the shipment exceed the unit limit, which prevents the card from being sent.

The Monitor is generally considered better than the Ironclad for long-range attacks. With the European Cannons or Offshore Support cards, Monitors can outrange all other ships. However, this range bonus only applies to its basic attack; the long-range attack is a fixed amount and damage versus ships is low (unless modified via the tactics discussed below).

Strategy[]

Fixed Gun[]

If a puddle of water is large enough to build a Dock, then it can usually hold a Monitor. This can grant easier control over a large area of a landlocked map, and obliterate or severely weaken any enemy units that encroach on the territory. Hot Air Balloons or the Spyglass ability can be used as a spotter for bombarding targets behind enemy walls that prevent passage of normal units.

Total tactic cost

The following includes Dock, Monitor (2), and upgrade costs. It does not take into account Spanish Unction, TEAM cards, or minor native civilization cost reduction cards for buildings and upgrades. It also does not include the Admiralty card for a third Monitor, which would add 800 wood, 200 coin to the costs (or subtract that, if a shot every 60 seconds is satisfactory). Keep in mind that the area of effect is very large, so when targeting tightly packed buildings click on the ground, not an individual building, to better spread the damage to multiple buildings. With armies, target a unit in the middle rather than the edge of the formation, or the area between the frontline and supporting cannons, for maximum effect. Unless leading a moving enemy army, in which case, use a best estimate.

  • 2,550 wood, 1,150 coin for all Monitor damage upgrades in the Industrial Age (including Improved Warships card). 350 damage per long-range shot, one shot every 30 seconds if staggered.
  • 4,050 wood, 2,650 coin with the Imperial Age upgrade. 450 damage per long-range shot, and one shot every 30 seconds if staggered.
Note: Water Ceremony for the Aztecs and Haudenosaunee, and Charging Ceremony for the Lakota can not be used to buff a Monitor, as maps with such puddles of water do not support naval unit TEAM cards as they lack a water delivery point.

4v4 Carpet bombing[]

The highest attainable damage for the Monitor's regular attack is 339.04 (3,390.4 vs buildings, 67.808 vs villagers), and the long-range attack is 847.6 (8,476 vs buildings, 169.52 vs villagers) in 4v4 games. It requires all upgrades and damage cards, including Spanish Unction, and a British (Monitor Combat), Chinese (Improved Warships), and Indian (Shivaji's Tactics) ally sending their TEAM cards. British Monitors will inflict 228 regular damage, and 570 long-range shot damage. India 224 regular damage, and 560 long-range. China 216 regular damage, and 540 long-range damage. With timing practice, such a team can lay down rapid bombardments in a large number of areas simultaneously via staggering the long-range shots of their ships while the Spanish focus on the enemy armies exclusively. The four civilizations also synergize well in another significant way explained here.

Special ability[]

  • Long-range bombardment attack.png Long-range Bombardment Attack: Fires a single mortar shell to the target from a range of 70, doing 200 (2,000 against Building, 40 against Villager, 20 against Docks) siege damage in an AOE of 10. 90 seconds cooldown.

Upgrades[]

Age Upgrade Cost Effect
Imperial Age
Imperial navy.png Imperial Monitor 1,500 wood,
1,500 coin
Upgrades Monitors to Imperial (+50% hit points and attack); requires Ship's Howitzers

Further statistics[]

Unit strengths and weaknesses
Strong vs. Buildings
Weak vs. Ships, artillery especially Culverins, defensive structures
Improvements
Hit points Armor Plating.png Armor Plating (+50%)
Ship's Howitzers.png Ship's Howitzers (+25%)
Rawhide Covers.png Rawhide Covers (+20%, Haudenosaunee only)
Attack Carronade.png Carronade (+25%)
Ship's Howitzers.png Ship's Howitzers (+25%)
Flaming Arrows.png Flaming Arrows (+25%, Lakota only)
Sight Town Watch.png Town Watch (+2)
Train cost Mapuche Ad-mapu.png Mapuche Ad-mapu (-10% coin cost)
Other Merritocracy.png Meritocracy (-20% upgrade cost)
Penalties Coffee Trade.png Coffee Trade (-10% speed, Dutch only)

Home City Cards[]

Click for a list of Home City Cards related to the Monitor
  • Green: TEAM Shipment that is sent to each player in a team
  • Purple: Shipment that can be sent an INFINITE number of times

All[]

Card Description Age HC level
British Home City 3 (Advanced Dock).png Advanced Dock Docks get +100% attack and heal ships 50% faster; Warship train time -33% (also +1 Villager for the Indians)
Age I tech tree aoe3.png
10
Spanish Home City 5 (1 Monitor).png 1 Monitor Ships 1 Monitor (also +1 Villager for the Indians)
Age IV tech tree aoe 3.png
10
Spanish Home City 5 (1 Monitor TEAM).png TEAM 1 Monitor Ships 1 Monitor
Age IV tech tree aoe 3.png
40
Spanish Home City 5 (Improved Warships).png Improved Warships Warships get +25% hit points and attack (also +1 Villager for the Indians)
Age II tech tree aoe3.png
10
British Home City 5 (Offshore Support).png Offshore Support Warships get +20% attack, +2 LOS, and +2 range
Age II tech tree aoe3.png
40
  • Since the Monitor can only be trained by European and Asian civilizations, "Advanced Dock" is only relevant to them.
  • The 1 Monitor card is available at a level 25 Home City for the Indians, while the Swedes have the "1 Monitor" card instead.
  • The TEAM 1 Monitor card is available to European civilizations except British and French.
  • The Improved Warships card is not available to the Lakota.
  • The Offshore Support card is available to Aztecs, British, and Ottomans.

Asians[]

Card Description Age HC level
Indian Home City 5 (European Cannons).png European Cannons Warships get +15% attack, +2 LOS, and +2 range; +1 Villager
Age II tech tree aoe3.png
40

British[]

Card Description Age HC level
British Home City 5 (Monitor Combat).png TEAM Monitor Combat Monitors get +15% hit points and attack
Age IV tech tree aoe 3.png
10
British Home City 5 (Naval Gunners).png Naval Gunners Warships get +25% attack
Age III tech tree aoe3.png
25

Chinese[]

Card Description Age HC level
Western reforms.png Western Reforms All units get +8% hit points and attack
Age IV tech tree aoe 3.png
40
Acupuncture aoe3.png Acupuncture Unit train time -20%
Age III tech tree aoe3.png
10
Team improved warships.png TEAM Improved Warships Warships get +15% hit points and attack
Age II tech tree aoe3.png
10

Indians[]

Card Description Age HC level
Shivajis tactics.png TEAM Shivaji's Tactics All units get +5% hit points and attack
Age IV tech tree aoe 3.png
25
Indian Home City 5 (Bombay Marine).png Bombay Marine Ship train time -30% and train bounty +30%; +1 Villager
Age I tech tree aoe3.png
1

Japanese[]

Card Description Age HC level
Japanese Home City 3 (Cheaper Unit Upgrades).png TEAM Cheaper Unit Upgrades Unit upgrades cost -20%
Age IV tech tree aoe 3.png
1

Portuguese[]

Card Description Age HC level
Portuguese Home City 3 (Navigation School).png Navigation School Warships cost -20% and train time -25%
Age II tech tree aoe3.png
25

Russians[]

Card Description Age HC level
Russian Home City 5 (Russian North Fleet).png Russian North Fleet Ships 1 Frigate and 1 Monitor
Age IV tech tree aoe 3.png
25
Russian Home City 5 (Cold Water Port).png TEAM Cold Water Port Warships cost -15%
Age II tech tree aoe3.png
10

Spanish[]

Card Description Age HC level
Spanish Home City 3 (Inquisition).png TEAM Inquisition All units get +10 LOS
Age I tech tree aoe3.png
10
Spanish Home City 5 (Armada).png Armada Warships get +20% hit points and 2 LOS; Caravels can now train infantry units; Frigates can now train cavalry and artillery units; Monitors can now train Mortars; Battleships can now train infantry, cavalry and artillery units
Age III tech tree aoe3.png
10

Changelog[]

Age of Empires III[]

  • Monitors cost 800 wood, 200 coin.
  • Monitors have a train/kill bounty of 100 XP.
  • Long-Range Bombardment Attack has a cooldown of 60 seconds and a range of 100.

Definitive Edition[]

  • Monitors now cost 600 wood, 200 coin.
  • Monitors now have a train/kill bounty of 80 XP.
  • Long-Range Bombardment Attack now has a cooldown of 90 seconds and a range of 70.

Trivia[]

  • "Monitor" actually refers to small turreted warships of post 1860s, but carrying disproportionate large guns. The correct name for this unit is thus "Bomb Vessel" or "Bomb Ship", although the Monitor's history section correctly refers to it as a bomb ship. The term "Monitor" referring instead to a purpose-built shore bombardment vessel does appear by the First World War, referring originally to a series of small ships built by the Royal Navy with spare battleship guns, and persists to modern usage, however.

History[]

Bomb ships or bomb ketches were made by removing the front masts of a warship to make room for one or more deck-mounted mortars. These ships could then bombard an enemy fortress from several miles away. The Star-Spangled Banner, the US national anthem, refers to such a bombardment.

Gallery[]

See also[]

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