North Hyrule was founded during the Hyrulian Civil War. The King and Bowser with support from the Squadala Man were fighting in the war (Squadala Man worked for Bowser). After several thousand battles, the King was weakening. Bowser had just enough power to capture half of Hyrule, and made East Hyrule and North Hyrule. Bowser let Squadala Man rule over East Hyrule (he later passed it onto Morshu, but that's not the point). Bowser set up his best castle here, and declared it one his primary country Bowser UnWorld Terrotories are North Hyrule's dominator of conquered countries mostly in Africa.