The Juggernaught is heavy war ship in Age of Empires. It is an upgrade of the Catapult Trireme and is available once Engineering is researched. The upgrade, available at the Dock, costs 2,000 food and 900 wood. Like all stone throwing heavy siege weapons, Juggernaughts deal 28 bonus damage against buildings after accounting for building armor.
The Juggernaught is far superior compared to its previous form in splash damage and more importantly, the amount of hit points. Before the Definitive Edition, the Juggernaught had the capability to knock down trees. Since the cost is very expensive in normal games such as random map, players usually ignore the upgrade and prefer the Catapult Trireme. However, in Deathmatches, this upgrade is very useful, especially if the player chooses the Phoenicians since their siege ships have the ability to fire +30% faster than ordinary ones.
A Juggernaught-like cheat unit called the Flying Dutchman can be obtained in the Scenario Editor and can also be summoned if the player types Flying Dutchman in the chat box. In appearance, it appears as a Juggernaught, but not only is it far superior in attack, it can also travel on land as if it were a land unit, as well as being able to travel on water. This unit can also be obtained in normal games via a cheat code.
The most remarkable advances in war ships appeared on the Mediterranean before the conquest of the entire region by Rome. These ships could reach enormous size, carrying crews of several thousand rowers and marines. They fought by firing catapults at each other until close enough to grapple and board. The largest were too slow to effectively ram each other. Because of their size and slowness, they could not operate far from shore and needed substantial support from supply ships carrying food and water for the crew. The largest were show ships, built in an arms race that emphasized size and expense instead of practicality.