Source: Distant Shores, pg(s). 8
Liachora was the capital of the city-state of Pol-Liachora in the Iblydan archipelago that also included the city of Aelyosos. It was destroyed by the thalassic behemoth Ousmariku at the beginning of the Age of Lost Omens. Its citizens were either killed in the attack or fled afterwards to Aelyosos. The ruins of Liachora have since been claimed by sahuagin.
For additional resources, see the Meta page.