The king of Karrnath since the tail end of the Last War, Kaius III was instrumental in bringing about the Thronehold Treaty which created the detente that exists today.

Kaius II took the throne in 991 after a series of political and military mistakes by his aunt, Regent Moranna. He made reparations to the offended dwarven Mror Holds and married the Aereni princess, Etrigani, as a show of power.