The Schism

The Schism is a historical event referenced in Fire Emblem Awakening.

Overview
The Schism was the name given to an event that partially bridges the historical gap between the events of Fire Emblem: Mystery of the Emblem and Fire Emblem Awakening. Though only vaguely described, it is indicated that the Schism resulted in the fall of the old nations of the Archanean continent and led to the foundation of new nations with new borders, including Ylisse, Plegia, and Ferox.