Curepos are comparatively well-trained, spear and javelin-armed mercenary Gallic light cavalry.
Curepos (Kor-ep-os; "Free Horse") are mercenary Gallic light cavalry. Comparatively well-trained to many of their enemies' cavalry, they are invaluable to a Gallic army. They throw javelins at a distance, depleting an enemy before charging with their main spears. They are trained to throw javelins, charge, and withdraw repeatedly, and they do it well. They are so named for their speed, rather than equipment. A bronze helmet, shield, and their weapons may not seem the equipment of any partiuclarly great cavalry, but they are a solid medium cavalry force, capable of running down routers, defeating light cavalry, and skirmishing if necessary.
Historically, Gauls were rather fond of cavalry in their later years. While Celts were originally more based upon infantry and chariots, and still were built around varying degrees of infantry, the value of extremely mobile cavalry was constantly more apparent. With that in mind, they developed good quality cavalry that could be used as both shock cavalry and ambushers. These cavalry were a large basis of what the Romans employed as their Gallic cavalry auxilia, though a bit heavier than the Gallic originals.
The mercenary variant of Leuce Epos, with identical stats, this unit is available over a large area and is very useful to any faction. Curepos are proficient at skirmishing and chasing routers. They are especially great at chasing down enemy generals that are fleeing or retreating - which is a common problem in campaign. It is also possible to "sandwich charge" an enemy cavalry unit with two units of light cavalry from both sides. This is often an efficient way of ensuring that the enemy general doesn't leave the field in one piece. Curepos as well as Leuce Epos are ideal for this because they are fast and enduring, but still reliable enough to overcome smaller enemy forces with brute force. Against medium or heavy infantry, one should be more cautious though.