Age Of Empires Ii: Age Of Kings -

: Units could finally take cover inside buildings like Town Centers and Castles, which in turn increased the building's defensive firepower.

Why are the campaigns historically inaccurate? :: Age of Empires II Age of Empires II: Age of Kings

: The original game featured 13 civilizations (such as the Britons, Franks, and Mongols), each with a unique unit and specific tech bonuses that forced players to adapt their strategies. History as a Playground : Units could finally take cover inside buildings