Gaul Units
Peasants
The last option of any desperate army (except perhaps slaves or convicts), peasants are good for increasing your numbers...and not much else. Poorly armed and with little military experience, their morale and discipline are both understandably low. They are cheap to train, however, and their one advantage is an ability to hide well. Peasants should be used as an absolute last resort, or in cases where funds are extremely short.
Skirmishers
Much like the Roman velites, skirmishers are restricted to peppering the enemy with long-range javelins before the actual battle commences. They can also be useful for acting as a distraction to the enemy, to lure them into an ambush, or to create a diversion by attacking some target. They are fairly useless in melee combat, and should not be subjected to it.
Foresters
Unlike the Romans, Carthaginians, and Egyptians (amongst others), the Gauls were still to a certain extent nomadic, moving across the land and building nothing larger than villages. These foresters are the hunters of this Gallic society, armed with spears and bows. Their experience in hunting makes them experts at hiding, and therefore ideally suited for ambushes. They are not, however, particularly strong in battle.
Warband/Spearmen
Every barbarian chieftain who has fought his way to the top of the tribe has had a warband to help him up there. These men tend to be bound by specific loyalties, and loyalties based more on a perception of strength than anything else. In battle they are the undisciplined barbarians that the Romans describe them as, but this lack of discipline can manifest itself as a ferocity that even the Romans fear. They are armed with spears.
Swordsmen
Spears were not the only weapon employed by the barbarian hordes, as these swordsmen will tell you. Like their warband counterparts, they have poor discipline, and will break and run if the battle seems to be going badly, but they are tough warriors while they last. They will not hold against a more disciplined Roman line in a fight.
Chosen Swordsmen
The elite warriors of the tribe, these swordsmen are unfortunately just as poor at following orders as anyone else – even more so, in fact, since they feel the need to prove their prowess in battle. They are better equipped than most barbarian infantry, though, and so can be used to better effect against the Romans or any other organized infantry body.
Naked Barbarians
This is a rather stereotypical unit that one finds in almost every game which features the Gauls. Nevertheless, the naked barbarians, wildest of the Gallic hordes, are truly a force to be reckoned with, as they are entirely without fear and think nothing of sacrificing themselves – as long as they can take their enemies down with them. They are poorly disciplined, obviously. Like most other Gauls, they are armed with swords.
Druids
The religious leaders of the pagan barbarians, druids also fought in battle, armed with swords and shields. Their most useful ability, though, is probably the huge increase in morale that they provide to their units. Druids should not be underestimated, and in fact taking them out first will probably have a negative effect on the rest of the men they are fighting alongside of.
War Dogs
Used occasionally in battle by various nations, these dogs were deliberately starved to make them all the more fierce (and hungry!). They were trained to target horse’s hamstrings and therefore could be used against either infantry or cavalry. Although they were obviously never used on the scale possible in the game, they could be a fairly formidable deterrent to any group of infantry.
Barbarian Cavalry
The light spear-wielding scout cavalry of the barbarians, these cavalrymen are as excitable as their counterparts from any other nation. Due to this, they are not a particularly disciplined force on the battlefield. However, they can be used for scouting, for ambushes, for cutting down fleeing enemy troops, and sometimes even for applying unexpected pressure on an enemy flank.
Barbarian Noble Cavalry
A few steps up the tribal pecking order, the barbarian cavalry is even more susceptible than Chosen Swordsmen or Barbarian Cavalry to going glory-hunting in the middle of a fight. Their aggressiveness can also be an advantage, though, if they are used correctly. Since they carry spears and shields, they can also be employed against other cavalry.
Warlord’s Cavalry
A bodyguard was, historically speaking, a functional unit, rather than a type of soldier. In the game, however, they are spear-armed shock cavalry, whose success or failure depends to a large extent on the personal characteristics of the general who they are guarding – his effect on their morale, for example, or on their discipline, will play a large role in determining how they fight. They are in all cases excellent troops.