Roboute Guilliman’s return is the moment Warhammer 40k’s biggest loyalist Primarch came back from near-death and took charge of a crumbling Imperium. It reset the setting’s status quo and gave humanity an actual protagonist again.
What actually happened
Guilliman spent around ten thousand years in stasis on Macragge, kept barely alive after his duel with his traitor brother Fulgrim during the Horus Heresy. In the Gathering Storm campaign (2017), Belisarius Cawl and the Eldar of the Ynnari revived him using a mix of arcane tech and xenos sorcery.
He woke to find the Imperium he’d helped build rotting from within: superstition instead of reason, bureaucracy instead of strategy, and the Emperor reduced to a skeletal figure on the Golden Throne. The shock of it is a big part of his character now.
Why it matters for the setting
Before this, the Primarchs were legend. Guilliman walking around in the 41st millennium turned myth into an active player, and it kicked off the Dark Imperium era. The Great Rift split the galaxy in half, and suddenly the Imperium had a Lord Commander actually trying to run things.
His return also dragged the setting forward in time. Plots that had been frozen for decades started moving, with new crusades, new threats, and a Primarch who openly questions whether the Imperium deserves saving.
- Ended the long stretch where no loyalist Primarch was active
- Launched the Dark Imperium storyline and the Indomitus Crusade
- Made the Emperor’s sons a live political force again, more than backstory
- Split fan opinion over using xenos help to resurrect him
Guilliman as Lord Commander
He didn’t just come back, he took the top job. Guilliman was named Lord Commander of the Imperium, effectively running the war effort and much of the government while the Emperor stays silent on the Throne.
That makes him the most stressed man in the galaxy. He’s trying to reform a theocracy he doesn’t believe in, fight on every front at once, and keep his father’s decaying empire from collapsing. The job is impossible and he knows it.
How it connects to wider lore
Guilliman’s return ties directly into the Great Rift, the Ynnari’s rise, Cawl’s Primaris Marines, and the Indomitus Crusade. The Primaris project in particular only got rolled out because he was there to authorise it.
It also sets up friction with the Ecclesiarchy and the Inquisition, who aren’t thrilled about a living Primarch telling them their religion is wrong. And it leaves the door open for other Primarchs, loyalist or traitor, to come back too.
| Event | What it did |
|---|---|
| Gathering Storm (2017) | Guilliman revived by Cawl and Yvraine |
| Great Rift opens | Galaxy split, Imperium in chaos |
| Indomitus Crusade | Guilliman leads a massive counter-offensive |
| Primaris Marines | New breed of Space Marines deployed |
Key facts
- Guilliman was revived in 2017 during the Gathering Storm campaign after ten thousand years in stasis.
- Belisarius Cawl and Yvraine of the Ynnari performed the resurrection using tech and xenos sorcery.
- He became Lord Commander of the Imperium, effectively running the war and government.
- His return triggered the Dark Imperium era, the Great Rift, and the Indomitus Crusade.
- The Primaris Marines only got deployed because Guilliman authorised them.
- He’s the only loyalist Primarch confirmed active in the modern 40k timeline.
FAQ
When did Roboute Guilliman return in Warhammer 40k?
He came back during the Gathering Storm campaign in 2017, revived by Belisarius Cawl and the Ynnari Eldar. This kicked off the Dark Imperium era.
How was Guilliman brought back to life?
Cawl’s technology plus Eldar sorcery from Yvraine healed his near-fatal wound from Fulgrim. The xenos involvement caused a lot of controversy in-universe.
What does Guilliman do after returning?
He becomes Lord Commander of the Imperium, launches the Indomitus Crusade, and tries to reform a decaying empire while the Emperor sits silent on the Throne.
Are other Primarchs coming back too?
Guilliman’s return opened the door narratively, but as of now he’s the only loyalist Primarch confirmed active in the modern setting. Fans speculate constantly about who’s next.