Port Maw is an ancient artificial world that has been turned into one of the great harbours of the Imperial Navy by human ingenuity. Located in ancient times at the very border of the Segmentum Obscurus and the Ultima Segmentum in what was then known as the Manachean Commonwealth, today Port Maw lies within the famed Gothic Sector of the Segmentum Obscurus and even has given its name to an entire sub-sector. Since its inception during the Great Crusade, Port Maw has always belonged to the Imperial Navy, or rather to the Armada Imperialis which preceded it. With the tactical need to establish second-line defence forces to protect the heavily industrialised and populated regions of the Manachean Commonwealth and the Cyclops Cluster Sub-sector, Port Maw was rapidly established as a great must