Sahuagin invasion reportedly caused by the Red Dragon Gof’Kagur. Happened to align with a zombie invasion from the cleric of Mast encountered the last session. Which also happened to align with a slave revolt reportedly started by the rebellion. On top of it all, the orc horde that was camped outside of the city gates, perhaps incited by one of the renegade orc hordes raided the city.
The players faught their way through a few sahuagin and eventually took care of the zombie invasion by disrupting the portal through which they were coming and slaying the cleric. Members of the Guild of Pure and Just magicians were working together to stem the tide.
The rest of the city managed to fight off the sahuagin invasion, but most of the slaves were freed in the chaos. The capital city was reportedly affected by the sahuagin invasion as well.