From PathfinderWiki

The Aerie is a fortress of Andoren Eagle Knights located in the northern reaches of the Kortos Mounts on the Isle of Kortos. Knights assigned to the post deal with thin air due to its elevation, poor food, and local hostilities in order to monitor and prevent any potential threats to Andoran that might originate from the Isle.1

As of 4720 AR, several scouts of the Aerie had recently been found decapitated. Despite a lack of evidence suggesting a suspect, most of the fort's troops believed the nearby Gorebreather tribe of minotaurs were responsible.2