As with all highly militarised zones, it is important for the Imperial Navy to maintain substantial reserves of vessels around the Eye of Terror, ready to deploy as reinforcements should the need arise.

However, those who survive the harsh first years of military service around the Cadian Gate rapidly mature to become some of the most capable leaders in the Imperium. Vast numbers of new, inexperienced Imperial Navy ratings frequently have to be drawn up to replace those lost in the constant fighting. The whole sector exists in an almost perpetual state of readiness, and as such the demands on manpower and resources are huge. The constant turmoil surrounding the Cadian Gate requires the fleets of Battlefleet Obscurus to be far more active than many other Segmentum battlefleets. As such, it currently is home to the majority of the Imperium's armed forces, which were most recently mobilised to a state of readiness not seen since the Horus Heresy as a result of the 13th Black Crusade in 999.M41. The Segmentum Obscurus is the area of the Imperium most often under deadly threat by attacks from the Eye of Terror and is also the site for all of Abaddon the Despoiler's Black Crusades. The Imperial Navy's Segmentum fleet headquarters is located at Cypra Mundi, which also serves as the central headquarters of the Imperial military's Segmentum Command. This Segmentum of the Imperium of Man is the home of the vast Warp Storm and Warp Rift called the Eye of Terror, the primary home for the Forces of Chaos in the Milky Way Galaxy. The Segmentum Obscurus is the region of Imperial space to the galactic north of Terra.

2.1 Notable Squadrons of Battlefleet GothicДepartmento Cartigraphicae Map of the Segmentum Obscurus.

2 Notable Vessels of Battlefleet Gothic.

Battlefleet gothic planet killer