700 years ago, The Akmaddian Empire sprawled central Historica. With its formidable cavalry's lightning tactics, it was able to conquer a massive area ranging from the cool steppe of southern Avalonia to the arid scrublands of northern Kaliphlin. Among the many races that fell under its domain was a large population of centaurs. Military cooperation between centaurs on non-centaurs (referred "two-legs" by the former) was historically limited. There rare instances of archers sitting on the backs of centaurs to operate as "tail-gunners", but these were rare.
The Akmaddians implemented a new role for their centaur soldiers: drawing chariots. A centaur didn't need to be controlled by whoever was in the chariot, allowing those inside to focus on the battle. Passengers could include archers or pike men. Usually fighting in duos, these teams were trained for years to master their craft, something which would pay off as they blazed a path across the continent.
The Akmaddian God-Emperor would eventually fall in battle, and the empire would fracture as his children battled for the throne. Though the empire only lasted 20 years, its effect on central Historican culture can still be felt today