Arcadian Isles

The Arcadian Isles are known to consist of Arcadia West, Arcadia East, Caldonia and Ethos. They are named for the multiple islands in the chain to claim the name "Arcadia" for themselves.
During the Age of Heroes the isles of Ancient Arcadia West and Ancient Arcadia East are confirmed to exist, each claiming to be the first landmass. When Caldonia came into existence is currently unknown.
During the Age of Might there was active trade, travel & conflict between the two Arcadias. Towards the end of the Age of Might human settlers travelled to Caldonia and set up colonies there.
At the end of the Age of Might occurred the Breaking of Arcadia. Arcadia West had deep river canyons form, land sink into the sea, and had a desert form. Arcadia East's become a mountain covered jungle. Caldonian was frozen over. Because of this event the people of Solum consider the Arcadian Isles cursed by the gods.
During the Age of Iron the island of Ethos was discovered.