The Xai Ascendancy, also known as Xyon, is a theocratic oligarchy located in the Rocky Mountains of North America. The Ascendancy spans some 30,000 square kilometers (18,641 square miles), and possess a population of 15.1 million citizens, with another 2.6 million living abroad in 10,000 km2 (6,213 sq mi) of colonies in foreign countries under Xai administration. The bulk of Xai territory consisting of its capital city, Oxida Nova, is located underground, and is walled off to foreign visitation. Given that the Ascendancy controls only territories within walled off cities such as the capital and the colonies, the nation is a purely urban one. The Ascendancy is also one of the few totally ethnically and culturally homogenous nations in the world.