>>14630611I dispute your headcanon.
The war was between Kalos and Unova.
Kyurem was the Technology legendary, teaching humans to use incredible machines. The great kingdom was divided between the ideal-seekers, who became Unova and used that technology to create an enormous industrial region, and the idealists, who founded Kalos using technology to produce art, culture, and sustainability.
The war that ravaged Unova was the same that ravaged Kalos. The reason King AZ, descendent of the idealists, created the Ultimate Weapon was because he had the knowledge of technology imparted by Zekrom (or Reshiram, I forget which).
Kalos and Unova are also both the only known regions which once had proper KINGDOMS, when the other regions seem to be loose assortments of autonomous townships connected by a sporting association (the Pokemon League).
Kalos and Unova are split regions, which were once a great kingdom unified under the ancestors of AZ and the Original Kyurem.
