Scales of Justice
300 years ago, the forces of dragonkind began to war- the good (metallic) dragons versus the evil (chromatic) dragons. The lands united with the good dragons to defeat the evil dragons, and wipe them out in their entirety. The five generals who worked with the dragons divided up the lands among them to form the five great Kingdoms (known as Pax Draconis.) After the rebuilding began, the good dragons left to fight evil in the other countries beyond the known world.