The Fallen are renegade Space Marines who turned on the Dark Angels Legion during the Horus Heresy, destroying their homeworld of Caliban and getting scattered across space and time by a Warp storm. Ten thousand years later, they’re still the Dark Angels’ most shameful secret, and hunting them down is the Chapter’s driving obsession.
Origins: betrayal on Caliban
The seeds of the Fallen were planted during the Great Crusade. Luther, second-in-command of the Dark Angels, grew jealous of his primarch Lion El’Jonson. After a campaign against the Sarosh, Luther hesitated to stop a nuclear warhead aimed at the Lion’s flagship. He saved the Lion in the end, but the primarch discovered his hesitation and sent Luther and his followers back to Caliban, a move many saw as banishment.
As the Horus Heresy raged and the Lion stayed away, Luther’s forces grew bitter and abandoned. They faced a rebellion on Caliban and became tainted by the Warp. Convinced the Lion had exiled them to die, they embraced treachery, purging loyalists and turning to Chaos to stop the uprising.
The destruction of Caliban
When the Horus Heresy ended, Lion El’Jonson returned to Caliban and his fleet was met with a devastating barrage from the planet’s defences. The battle that followed shattered Caliban. The planet broke apart, and the Fallen were hurled through the Warp, scattered across time and space.
That catastrophe is why the Dark Angels and their successors, known as the Unforgiven, are so secretive. They’ve spent ten thousand years trying to capture or kill every last Fallen, convinced that only then can they atone for their Legion’s shame.
What happened to the Fallen?
The Fallen didn’t all stay on the same path. Some became Chaos Space Marines, others turned to piracy or became renegade warlords. A few regretted their heresy and live quietly, while others have even served the Imperium loyally.
Their leader Luther was originally in charge, but now they’re decentralized into disparate groups. Some, like the mysterious Cypher, have their own agendas. The Risen are a newer group of Fallen who’ve returned to fight for the Imperium, though the Unforgiven don’t trust them easily.
- Chaos Space Marines: many Fallen fully embraced the Ruinous Powers.
- Renegades and pirates: some became warlords or raiders.
- Penitent: a few regret their betrayal and seek redemption.
- The Risen: Fallen who now fight for the Imperium, though their loyalty is questioned.
Why the Fallen matter
The Fallen are the dark mirror of the Dark Angels. They represent the Chapter’s greatest failure and the reason for its obsessive secrecy. The hunt for them drives the Unforgiven to extreme lengths, including torture and murder, to keep their shame hidden.
In the wider setting, the Fallen add moral ambiguity. They’re more than faceless traitors; some are victims of circumstance, and a few genuinely seek redemption. That makes them one of the most interesting factions in Warhammer 40k.
Key facts
- The Fallen are renegade Dark Angels who turned on their Legion during the Horus Heresy.
- They were scattered across space and time when Caliban was destroyed by a Warp storm.
- Their original leader was Luther, the Lion’s second-in-command.
- Some Fallen became Chaos Space Marines, others renegades, and a few seek redemption.
- The Dark Angels and their successors, the Unforgiven, have hunted them for ten thousand years.
FAQ
Who are the Fallen in Warhammer 40k?
The Fallen are renegade Space Marines from the Dark Angels Legion who betrayed their primarch during the Horus Heresy. They were scattered through the Warp when Caliban was destroyed and now exist as Chaos Marines, renegades, or even penitent loyalists.
Why do the Dark Angels hunt the Fallen?
The Dark Angels and their successors, the Unforgiven, believe that capturing or killing all the Fallen will erase their Legion’s shame. It’s a secret obsession that drives them to extreme measures.
Are all Fallen Chaos Space Marines?
No. Some became Chaos Marines, but others are pirates, warlords, or peaceful recluses. A few have even returned to serve the Imperium as the Risen.