The Dorian States
The Dorian States are the remnants of the once Kingdom of Dor.
When the last King of Dor, Belath, was killed in battle, his three sons divided his kingdom among them. Belath had never named an heir and, due to the 150 year war with the Moriathan Empire, none amoung the sons had the military might to seize the kingdom by force.
Instead the meet at the capital and formed the Treaty, which divided the lands controlled by the kingdom into three states, named Alath, Thaleb and Bel after the three sons.
The capital, Dor, was excluded from all three states so that the leaders of the three states could meet on neutral territory when needed. Thus Dor became the fourth state of the empire.