Event · M38

Hundred Planet Rebellion

The Hundred Planet Rebellion was an anti-Imperial uprising in M38 near the Veiled Region, led by the priest Alldric the Subverter. The rebellion arose among worlds bordering the Veiled Region, where Alldric the Subverter, a priest preaching heresy against the Imperium, won a following broad enough to draw a swathe of planets into open revolt. No specific world, segmentum, or precise year for the outbreak is recorded; the uprising is dated only to M38. The Dark Angels, a Space Marine Chapter following the trail of the renegade Cypher through the region, came upon the unrest and identified Alldric as its instigator. They were joined by several successor Chapters of the Unforgiven, the grouping of Chapters descended from the Dark Angels Legion, in an effort to suppress the revolt. The combined force broke the cultist uprising across the affected worlds and killed Alldric the Subverter, bringing the rebellion to an end.