A potential game-changer, the Arquebus Tercio is best described as a militant cleric with a gun. This unit has two functions: it can create deadly volleys of shot, and it can also heal friendly units in their vicinity, ensuring that your units' morale and resistance can be maintained between battles. This ability can be very useful in maintaining your troops in long expeditions into enemy territory, and the presence of arquebus Tercios can often mean a difference between victory and defeat during heated infantry battles. Keep your Tercios close to your troops at all times, as although they are capable of healing one another, Tercios are still vulnerable to the usual weapons: archers and cannon will get to them, and heavy cavalry can charge them, albeit with substantial losses.