Oerba is a thriving city, occupied by humans and 'protected' by the Fal'Cie Dahaka, who lives just beyond the town in Taejin's Tower. These humans came from the distant past as a result of Bhunivelze's attempt to patch up the world and doing so with many different era's converging, and have not yet had any reason not to trust the Fal'cie, and they have not yet experienced the War of Transgression.

Among the citizens here are Fang and Vanille. As a consequence of that, their presence in Cocoon was wiped from the new history. This led to some positive and negative repercussions in Cocoon.