The war was initiated by Fire Lord Sozin, who wished to expand the Fire Nation into a worldwide empire and spread what he saw as his nation's prosperity to the rest of the world. However, over the course of the escalating conflict, several smaller factions became involved in the fighting as well. The conflict was waged by the Fire Nation against the other three nations: the Earth Kingdom, the Water Tribes, and the Air Nomads. The Hundred Year War, also known as the Great War or just the War, was a major global military conflict that began with the Air Nomad Genocide and lasted for a century, from 0 AG to 100 AG.

Dai Li representative (Spring - Summer 100 AG).Princess Azula (Late 99 AG - Summer 100 AG).Fire Lord Sozin (Late summer 0 AG - 20 AG)†.Grand Secretariat Long Feng (? - Spring 100 AG).Avatar Aang (Winter 99 AG - Summer 100 AG).