Here's the info from the OP post on the area:

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Salished Empire: In spite of the fertility and wealth of its lands, the vast majority of the Rainland's inhabitants live squalid, depauperate lives as serfs and servants. In exchange for the protection of the land from the savage hordes from the unsettled world, these serfs toil all their lives to enrich the masters responsible for their safety.

The Salished Dynasty came about in the Year of the Setting Sun 7,200, when a tribe of mountain folk known to history as the Saliszi descended from the Godsfang Mountains to invade the verdant Rainlands below. The Saliszi warriors fought with weapons forged from Soulsteel, a magic-resistant, hypersharp metal that the petty Rainlander kingdoms had never encountered before. Saliszi swords were immeasurably superior against Rainlanders armed with iron and even Drathan-enchanted weapons. By 7,380, the Saliszi had established dominance over the eastern Rainlands. There, the Saliszi king Mardok established the city of Nyssos at the confluence of the Nabal and Tashgad rivers - and remains the seat of power of the modern Salished Empire to this day. A mixture of cultures transpired in the new Salished kingdom, Salished warriors adopted the lamellar armor, archery tradiation, and chariots of the Rainlands, while the inhabitants absorbed the language, architectural motifs, and religious concepts of their occupiers.

Over the next two centuries, the Salished Kingdom expanded across the rainlands. The conquest of the southern kingdom of Moribon gave the Salisheds the exceptionally fertile Nabal Delta and unhindered access to the sea. 

Today, the Salished Empire is a sprawling bureaucratic state and is by far the most powerful nation on Azoth. United under the iron first of the Shashul, a warlord-emperor who commands the loyalty of a fearsome military machine, the true key to Salished strength is the Cult of the Forge: a monastic religious order devoted to cruel and hungry deities they believe reside in their Sacred Forges, where the Soulsteel is created. The gods, however, are ever-hungry, and require a constant stream of sacrifices in exchange for their boons. Virgins will do, but great mages and warriors are above all prized. 

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