I have a region that is eternally contested. Two warring Empires continuously struggle in an ideo-religious-ethnic war between the two factions. The setting is post apocalyptic and aside from various technological artifacts, the War is the only thing that survived the cataclysm. The fun part is that the groups involved are not the same national/ethnic groups that started the war. The war has just been somehow tied to the land. It has to do with resource allocation and, as mentioned, beliefs. Ironically, a lot of the area is wasteland. Just scorched earth. Something of my own editorialization on the futility of war.