The defensive units are:
Spear fighters , Swordsmen, Archers, Heavy Cavalry* and Paladin.
- Heavy Cavalry is like an exception as it's used as fast support - a defense of spears and swords is much better.
They are called defensive units because they have good defense skills but poor offensive ones.
- [Calvalry] is good offensive units aswell. So see it as having your bread buttered both sides.