Fading Light

The Fading Light is the name of the period of systematic isolation of the Crimson Sentinels Space Marine Chapter, when they decided to isolate themselves for a long period of time following the death of their Chapter Master Tiberus Demokan during the Illuminous Crusade at the hands of a Greater Daemon of Khorne. Cutting all ties and communication to the outside galaxy, the Chapter focused on building up the defences of their demesne and to increase the maximum number of allotted battle-brothers, the better to stave off such a massive invasion of their home system again.

History
During 624.M34, after the death of Tiberus Demokan in the Illuminus Crusade to the hands of the Khorne Bloodthirster Ulk'Arcan, the Crimson Sentinel's new High Sentinel Andreas Valorem decreed for the Emground system would enter a state of isolation from the Imperium of Man. Andreas felt great shame from their Chapter's failures in the Emground Slaughter, being unable to defend their Chapter Master and letting most of their conquered territory to the forces of Chaos, enter a period of isolation. They shut themselves from the outside galaxy, cutting all outside communication and building upon the defences of the Emground System. While they had increased their defenses and recruited more than nominal numbers of Astartes, reaching over 2,000 Crimson Sentinel Astartes within the chapter.