Cadian Subsector

The Cadian Sub-sector is the inner administrative cube of the Cadian Gate, the sub-sector that holds the Cadian System and the sister worlds that used to feed Cadia's kasrs. It sits in the Cadian Sector of Segmentum Obscurus, and for ten millennia this was the paperwork around the only fleet-scale corridor out of the Eye.

Belisar, Farness, Urthwart, and the Cadian System itself share this chart. When Cadia's pylons failed, the sub-sector did not vanish with the fortress world — it became the remaining lock, a scatter of forge-moons, agri-rocks, and wounded fleet bases. Later defences treat these worlds as the new front, not as a rear dump for Cadian-born regiments.

The Cadian Sub-sector still matters because the Gate is a geography, not a single planet. Unofficial fan maps keep the cadian-sector parent; Cadia stays a grandchild via cadian-system, not a direct child of this row.