Corsair Alliance

At the end of the Age of Iron, the Verdant Shores had been desolated, transformed into the Scourshores. The prior population had no intention of returning, but the beachead at Voruna had been built into a functional fort, and abandoned at the end of the campaign. Unusued, the Voruna beachhead fortress was turned into a prison, to house prisoners of war, pirates from the Pirate Queen's fleet, and other "undesireables". With a focus on rebuilding, few resources were put into the island prison, and in under a decade, the prisoners revolted, slaying their captors. The alliance under the Order of the Golden Rose responded by sinking all ships docked at the Scourshores and leaving them to their own devices, simply lacking the resources for a more direct approach, and expecting the prisoners to starve without resupply.
The prisoners turned out to be far more resilient than imagened, cobbling together small fishing vessels from scrap, and learning to survive from the bounty of the sea if the land can offer nothing. Eventually, over thirty years after they were abandoned, a merchant ship came to see what salvage could be found, only to discover a society that, if not thriving, was at least surviving. They quarried stone to build up the fortress of Voruna into a town, and had spread to build other, small settlements, even using their scrap-ships to move people to other islands, claiming the entire chain as their own. Some of the population, old pirates, wanted to take the merchant ships, but many had grown old and tired, and still more were concerned about drawing the attention of the Order. In the end, they traded with the merchants, particularly in pearls and coral, and other ocean-based good, which drew attention from a few more mechants, allowing them to aquire lumber, and using the skills stil held by some of the elders, began constructing thier own ships.
Soon, other outcasts began flocking to the isles, to escape persecution, and more settlements emerged, as well as a valuable resource - Geiststone, mineral deposites infused with necrotic power, vauable to arcanists. Geiststone is now the primary export of the Alliance. As more people came, populations grew, eventually laws were needed, structure and government. The ex-prisoners emerged as an alliance of small villages and town, using Voruna as their capital, and declared themselves the Corsair Alliance.
People of the Corsair Alliance most commonly drink what they call "Grog", although that translates closer to "Whatever they can get their hands on, usually watered down".