In the end, what lead to the merchants rising was the madness of one man. Peace had settled across the South - Jon had been sated of the rage of his youth, and Garson could see that the war between them would have no end - and so they were beggining to make up for past greivances, with trade began to open between Lee and Westingforth for the first time in over twenty years. Darion's son was growing into an able lad, now in his teens. But things were only going one way in Perne - and the mad king grew madder. People were being kidnapped from the city at whim - and during the day he liked to dream up new horrors to inflict upon his citizenry by night. His family watched on in horror, and some of them found themselves upon his receiving end - while many others fled.
The news of his horrors travelled to the other nobles, however they did little about it, fearing what would happen to their children at the university - Jon and Garson did not care so long as their children were unharmed, and neither did Karus's regent. For once they had peace, and everyone was sick of war.
But it was one fateful night which changed the course of the South forever. And it was the night he found himself with a senior merchant of the coiners, found wandering the red district. And while Nervon submitted him to his tortures, the man laughed and boasted of how he was a thousand times richer than the king, and had bought more pleasures than Nervon could ever afford - the man died screaming, but his boast had set the world in motion.
The next day, Nervon ordered the city to be sacked, and all the gold within it to be brought to him - he wished to see what pleasures all the money in the world could buy. But he did not live out the day - the merchants had too much to lose, and rather then let the mad king take it, they banded together and bought out his general - and with his own men stormed the watery veil, and it is told the leader of the coiners stabbed Nervon through where he stood. Though Aed's crown was never seen again.
With the seat of the king in their hands, the merchants saw fit to proclaim themselves the regents of the land - and sent messages out to all the nobles demanding that they come to Perne, to 'discuss' the new government.
Upon hearing the news, Jon sent envoys to Karus, Minster and Sterling, calling for an election for the next king, and expressing that "the merchants needed to be put back in their place".
But Jon forgot the debts that he owed, and as did Sterling - that was their mistake. The letter was intercepted, and upon reading it the coalition determined that they could not rule with the nobles present - so they ordered for them to be killed.
Karus's regent was bought off, and while going upon his first sail, Karus's heir mysteriously fell overboard, and when the ship returned the merchant guild of Severon - lead by the renowned shipbuilder whom constructed the Motlass, and made them rich, assumed control of the province. Similarly, the contracts of the Mortenguard and the Skarlingas found themselves renegotiated in secrets, and their patrons changed. The Coiners let out Sterling's loan to Argine, and with the Mortenguard on their side, Jon was killed by his gaurds in broad daylight, while he ate his breakfast, and then the rest of his family. The same thing happened in Westingforth, with D'lyle finding themselves employing the Skarlingas to remove all trace of Garson and Sterling.
And so over the period of a few weeks, the coalition and their elected baron found themselves the sole powers to rule in the South.