Overview
Belis Corona is a fleet anchorage whose yards, depots, and quarantine stations exist to keep Battlefleet Obscurus fighting near the Eye.
Its importance rose with every Black Crusade and did not fall when Cadia did.
On the dark side of the Rift, a working dock is worth more than a victorious speech.
M41 and M42 status
Naval anchorage guarding the Cadian approaches.
Nihilus-side fleet base operating under broken skies.
Timeline
Yard expansion supports intensified Cadian Gate patrols.
Fleet musters and quarantine stations stand at heightened readiness as Cadian Gate tensions rise.
The 13th Black Crusade breaks and the Rift opens; the anchorage serves as a segmentum-defence headquarters before it is cut off from Terra's light.
Nihilus fleet remnants treat the base as a rallying constant.
Cartographic positions and several administrative details are intentionally approximate where published Warhammer sources conflict or provide no canonical coordinate system.