Units deal less damage in battle as their health decreases, but after a battle ends, any surviving units can restore their health. By default, a military building can train and hold two units after being built, but it has two more slots to be unlocked using coins and suppliesand a fifth slot that needs diamonds to unlock. For example, to obtain a Spearfighter, players must have researched the 'Spears' technology and built a Spearfighter Barracks. To obtain a unit, players have to build their corresponding military building after having researched the technology. For example, Spearfighters gain 2 defense points when on the 'bushes' type of terrain and Stone Throwers gain 1 attack point when on the 'hills' type. Units can also gain an attack and/or defense bonus when on a certain type of terrain on the battlefield. These bonuses are often critical in making your units most effective in battle. For example, a Legionnaire will gain both an attack and defense bonus while fighting Light Unit Class units, such as a Soldier. Unit Classes gain bonuses against other classes, giving them an advantage against them. They each have different properties, and players need to change their play style and tactics depending on which units they decide to use. They are light units, heavy units, fast units, ranged units, and artillery units. There are five classes of military units in the game. Military units are the soldiers used in battle, acting an essential role in the game.

Modern age of empires