The wood elven Arboreans, githyanki Somnians and sea-dwelling Thalassian elves unite in defense of their kin. The Treatise persisted for nearly two centuries, until the Thalassians shattered their counterfeit copy of the Aegis Eternal, attempting to strongarm the Arboreans into doing the same so the elves may find the true Aegis and better protect it. This gambit failed, in part, and the Arboreans broke off the treaty.