@setsneedtofeed
The Court of the Mortive Expanse arose when a Knight world was isolate upon the opening of the Great Rift. Warp-time-shenanigans resulted in them defending themselves alone for a century or more. When contact was reestablished with the Imperium, instead of sending the requested aid, the Dark Angels chapter arrived demanding supplies and when they didn't immediately comply they were declared renegades. Already strained to the breaking point, the Court finally succumbed to Chaos.
@setsneedtofeed
The Court of the Mortive Expanse arose when a Knight world was isolate upon the opening of the Great Rift. Warp-time-shenanigans resulted in them defending themselves alone for a century or more. When contact was reestablished with the Imperium, instead of sending the requested aid, the Dark Angels chapter arrived demanding supplies and when they didn't immediately comply they were declared renegades. Already strained to the breaking point, the Court finally succumbed to Chaos.