 Then the troops can be maneuvered around the battlefield and finally into combat.There is a variety of unit types with different abilities, both in battle and in moving across the various types of terrain.Infantry is a basic ground unit, while guerrilla units can move through terrain impassable to others, and use surprise attacks; cavalry requires open terrain, but their shock charges can be devastating to foot troops; engineers are cannon-using artillery that also can create and destroy bridges.