Chronicles of Khaldun: Crux of Eternity
The Cackledread War was a conflict fifty years ago when the gnolls and their demonic allies made one major push to crush civilization. They failed, but the Nerathi Empire collapsed in the aftermath.
Several settlements were destroyed or heavily impacted by the conflict, particularly since gnolls obtained access to the portal keys necessary to use the Portal Circle network allowing them to send small warbands inside the cities and towns of Sorgheim. Sorgforge, for example, occupies about half of its prewar space; the outer portions of the city are ruined and burned. Scandshar was mostly unscathed, although even it lost a ward of the city in the fighting.