| This article is about the units in Age of Empires II. For units in other games of the series, see Unit. |
The following is an overview of all units from Age of Empires II and all its expansions.
Trainable 
Edit
The following units are available in any regular game. Note that not all of these units are available to all civilizations, unless the All Techs option is checked. To see which civilization can train which units, see technology tree.
Nine different buildings can train units.
Town Center Edit
The Town Center is the most important of all buildings, and trains the most important unit.
Barracks Edit
The Barracks trains and upgrades infantry.
Militia → 
Man-at-Arms → Long Swordsman → Two-Handed Swordsman → Champion
- Spearman → Pikeman → Halberdier
- Eagle Scout → Eagle Warrior → Elite Eagle Warrior
- Condottiero (Italians and allies only)
- Huskarl (Goths only after researching Anarchy)
Archery Range Edit
The Archery Range trains and upgrades archers.
- Archer → Crossbowman → Arbalest
- Skirmisher → Elite Skirmisher → Imperial Skirmisher (the latter Vietnamese and allies only)
- Cavalry Archer → Heavy Cavalry Archer
- Hand Cannoneer
- Slinger (Incas only)
- Genitour → Elite Genitour (Berbers and allies only)
Stable Edit
The Stable trains and upgrades cavalry.
- Scout Cavalry → Light Cavalry → Hussar
- Knight → Cavalier → Paladin
- Camel → Heavy Camel → Imperial Camel (the latter Indians only)
- Battle Elephant → Elite Battle Elephant
- Tarkan → Elite Tarkan (Huns only after researching Marauders)
Siege Workshop Edit
The Siege Workshop trains and upgrades siege weapons.
