Hundred Planet Rebellion
The Hundred Planet Rebellion was a serious mass anti-Imperial rebellion taking place on worlds bordering the Veiled Region in M38. While the Dark Angels were attempting to follow the path of the mysterious Cypher, they uncovered a mad priest named Alldric the Subverter. The heretic visionary would lead a swathe of planets in the region into open rebellion, resulting in the Dark Angels and several of their Successor Chapters suppressing the cultists and slaying their leader.
- 1: Codex: Dark Angels (7th Edition), pgs. 36-38
- 2: Dataslate: Cypher - Lord of the Fallen - Everywhere and Nowhere