Unit class (Civ4)

A unit class is the "family" to which each unit in Civilization IV and its expansions belongs. A unit's class determines which promotions it can earn, and some classes get bonuses against others in combat.
The different unit classes are as follows:
* Air unit
* Archery unit
* Armored unit
* Gunpowder unit
* Helicopter unit
* Melee unit
* Mounted unit
* Naval unit
* Recon unit
* Siege weapon
* Classless units