South of the Tyrolian Mountains, there lies the fortified region of Sector 15. Placed under permanent curfew and relentless patrolled by Adeptus Arbites Enforcer Teams, it is rumoured that the region is also home to the local branch of the Imperial Inquisition – whether there is any truth in the matter, is subject to heavy debate. What is known, however, is that Tullius has studiously avoided the region, and even installed listening posts in the mountains to glean information about unscheduled arrivals and departures of unmarked void vessels. What secrets are held in this region, only time – or a successful conqueror – will tell.