Plague / Epidemic
Started when Davin Riversalt contracted Spread Stone after he and a band of knights faught a group of Skole causing problems at a nearby mine. Davin died from his infection, but not before starting the plague that spread from Reed to Siv within a couple months. It attacked the city quickly, even infecting members of the royal family. It took another year and a half to kill off the disease spreading through the population. Total deathtoll was between the two cities was 16,000.