The Turtle Ship, a heavy warship
The heavy warship armor class (also known as the Turtle Ship armor class) is an armor class introduced in Age of Empires II: The Conquerors. All units that have an attack bonus against this class deal bonus damage against units with this armor class. Units in this armor class have very high ship armor, hence are very resistant to anti-ship attacks. To make these units have a proper counter, they are made weaker against Fire Galley line, which possess an attack bonus against this class as well.
Heavy warships[]
The following units have the heavy warship armor class and take bonus damage from attacks against this class.
Turtle Ship - 
Elite Turtle Ship (Koreans only)
Thirisadai (Dravidians only)
Anti-heavy warship units[]
The following units have an attack bonus against the heavy warship armor class. They are sorted descending by the amount of bonus damage they deal.
+4 bonus attack
- Dragon Ship (Chinese only)
+3 bonus attack
+2 bonus attack
+1 bonus attack
| Armor classes in Age of Empires II | |
|---|---|
| Infantry | Infantry · Spearman · Shock infantry · Condottiero |
| Archer | Archer · Cavalry archer · Skirmisher |
| Mounted | Cavalry · Camel · War elephant · Mameluke |
| Siege | Siege weapon · Heavy siege · Ram |
| Building | Building · Standard building · Wall and gate · Stone defense · Castle · House |
| Ship | Ship · Fishing Ship · Heavy warship |
| Other | Monk · Unique unit · Gunpowder unit · Hero |