Aecus is the name of the known world, consisting of eight nations:
- W: Cognitutus and the Infinite Ocean.
- NW: the Trell archipelago and the Relentless Hurricane.
- N: the Zephyr Federation in the Ventosa Flatland and Cliffs of Transcendance, beyond which floats Skyrealm.
- NE: The Radiant Union of Pelor, an arid region consisting of the Scorching Plains and Desert of Ruin, and bordering the Endless Waste.
- E: The Mountain and the Veldt, beyond which lies the Everburn.
- SE: The Selva, a vast rainforest leading into the Jungle of Horrors.
- S: The forests of Elyria, which thicken southward into the Deepwood.
- SW: The frozen undead nation of Arallu, in which lies the Forest of Shadows, the Acrid Marshes, the Frozen Warrens, and the Glacier of Titans.
And in the center the Flux, an uninhabitable region bordering all nations.
See also Aecus Concord, an organization founded in the wake of The Vanishing.