Gong
Built on Aon's Bay, Gong was the largest port city of The Eastern Provinces and a crucial part of the food supply for the land. Harvests of fresh fish and other aquatic bounty from the ocean provided the entirety of the East with a strong liking for seafood. Of course, the further inland one traveled, the less prevalent the taste for seafood as sluggdon became the more common livestock.
Gong became much larger following the Songkram Empire's rise to power, with it becoming the new capital of the Eastern Provinces and the location of the Castletower. Gong was also the site of the Songkram's first formation in 260 DHT.
Gong was located in the less fertile grounds outside of the Sangmyung Valley, but the sea being so close offset the reduced effectiveness of terrestrial farming.