Battlefleet Orpheus

Battlefleet Orpheus is a permanent detachment of the Imperial Navy charged with the protection of the Orpheus Sector on the exterior borders of the Segmentum Tempestus. As one of the frontier fleets of the Imperium of Mankind, Battlefleet Orpheus lacks the numbers or tonnage of more powerful formations such as Battlefleet Gothic ot Battlefleet Armageddon, but as most branches of the Imperial Navy carries forth a proud history. Unfortunately, Battlefleet Orpheus has suffered severe casualties in the recent and still ongoing Orphean War. With the formal dissolution of the Orpheus Sector in 999.M41, the Battlefleet’s fate remains unclear.

Segmentum Tempestus
The Segmentum Tempestus is one of the five Sector Majoris or great administrative regions which compose the domains of the Holy Emperor and the Imperium of Mankind. Located to the galactic South of the Segmentum Solar and Terra itself, the Segmentum Tempestus -which loosely translates as "the Sector of Storms" - owns its name to the turbulent Warp-routes and other strange phenomena that plague the Segmentum’s shipping lanes. Perhaps mercifully for the forces of the Imperial Navy stationned there, the Segmentum Tempestus is free of large scale Warp-anomalies such as the Eye of Terror and the Maelstrom which offer pirates and armies of the Ruinous Powers a safe harbour to amass their strength before striking again at the Imperium. As such, the Imperial Navy of this region of space is more often confronted by xenos raiders rather than fully fledged warfleets, which the notable exceptions of the Ork-held domains of V’run and Jurn which occasionnaly launch invasions known as WAAAGHH!!!s. Segmentum Headquarters are located on and around the Imperial Forge World of Bakka, which also commands the most powerful warfleet of the Segmentum, Battlefleet Bakka. Due to the uncertainties of the Warp within the Segmentum, the Battlefleets of the Segmentum Tempestus are used to long and often extended patrols, hunting down xenos and human corsairs or pirates and investigating distress signals while the most powerful units serve as tactical reserve with Battlefleet Bakka as was the case in the First Tyrannic War.