Units
In AOE2, each civilization though having different special units and abilities, and though some of their technologies may limit their natural units, all nationalities share each line of normal units. So... here they are!!
Villagers are the center of
your economy. Your repairers, your workers, and basically the root of your
empire. It is good to have many villagers especially with a high population
limit game to get numerous resources. The best way to gain sufficient resources
is for villagers to WORK TOGETHER and not to have any of them idle. Also,
Villagers are who can work on FARMS, which is probably one of your most
important structures.
INFANTRY

These are barracks units. Like them? Who wouldn't? They are your main infantry, Pikemen used for against Calvary and your infantry used against archers, got to love the infantry.
CALVARY





Got to love Calvary, high attack and higher defense than infantry. Extremely weak against spear class infantry though, be careful when sending them into battle against those. Despite that, they are good against archers and infantry!
ARCHERS

Archers! We all love archers, especially for knocking down brutal enemies. Archers were more effective in AOE1 than in AOE2, but despite that Archers are still a force to be reckoned with! Got to love them as they will shoot down all enemies who dare come near your area!
SIEGEWARE

Siegeware is just that, Siegeware. These incredible units enable you to smash through enemy walls and buildings to break down enemy defenses, and then send your main forces in to destroy all who stand in your way! Siegeware can be very cheap actually due to the amounts that you can build of it, but powerful nevertheless.