![Age of empires 2 special units](https://cdn-ak.f.st-hatena.com/images/fotolife/g/greathigh-power/20200126/20200126193949.jpg)
![age of empires 2 special units age of empires 2 special units](https://static.wikia.nocookie.net/ageofempires/images/3/31/Uniqueaok.png)
The Barracks trains and upgrades infantry.
![age of empires 2 special units age of empires 2 special units](https://diamondlobby.com/wp-content/uploads/2021/04/age-of-empires-2-laming-1.jpg)
![age of empires 2 special units age of empires 2 special units](https://news.xbox.com/en-us/wp-content/uploads/sites/2/age-of-empires-pc-003.jpg)
Nine different buildings can train units. To see which civilization can train which units, see technology tree. Note that not all of these units are available to all civilizations, unless the All Techs option is checked. The following units are available in any regular game.
![Age of empires 2 special units](https://cdn-ak.f.st-hatena.com/images/fotolife/g/greathigh-power/20200126/20200126193949.jpg)