Sometime around the start of M32, during the Great Scouring against the worlds of the Yasan Sector, Jaghatai Khan led the White Scars in pursuit of a Drukhari warlord. The fight pulled him onto the planet Corusil V. The xenos fled into a Webway gate. The Khan rode through after them. His honour guard rode in too. The fleet waited. The fleet was still waiting ten thousand years later.
Of all twenty primarchs, Jaghatai Khan has the most specifically ambiguous fate. Magnus is a daemon prince. Mortarion runs a plague legion. Sanguinius is dead in a way nobody has ever been able to undo, even though the Blood Angels keep his body in stasis. Konrad Curze sat down and let an assassin kill him. Roboute Guilliman returned in 999.M41 and resumed command of the Imperium.
Jaghatai Khan rode his jetbike into a corridor that doesn’t have a fixed shape and didn’t ride out the other side. Every White Scars Chapter Master since the Great Scouring has held the legion’s command in trust, on the assumption that the Khan will eventually find his way back through the maze.
Who he was
Jaghatai Khan was the primarch of the V Legion. He was raised on Mundus Planus (Chogoris to the people who lived there) by a steppe-warrior tribe called the Talskars. By the time the Emperor showed up to collect his missing son, Khan had already conquered the planet from a centralising warlord called the Palatine, mounted his successor on the throne, and watched the empire dissolve when the tribes refused to be ruled from a single capital.
That last detail did most of the heavy lifting in shaping the Khan as a primarch. He had built an empire and watched it fall apart simply because his own people preferred their old lives. So when the Emperor turned up offering him a galactic version of the same project, Khan said yes, but he never quite stopped being the man who’d already learned the lesson.
The White Scars, when he took command of them, became the fastest legion in the Imperium. Fast in the sense that they hit you in three places at once and left before you’d noticed they were there. Bikes, jetbikes, Land Speeders. Anything that moved at speed and then kept moving. The doctrine arrived with the Khan, and the legion was reshaped around it.
The Stormseer dodge
The Edicts of Nikaea, which the Emperor pronounced after Magnus’s brother-vs-brother quarrel about psychic powers, banned the Librarian programme across all legions. Anyone caught using Astartes psyker abilities was supposed to be put down. This was not a soft suggestion. Russ later annihilated Prospero in part because of how the Edicts were interpreted.
The White Scars were the only legion that simply ignored the order. Their argument: the edict bans Librarians. Our psykers are Stormseers. They predate the legion. They predate the Imperium, actually. They’re an institution from Chogoris going back to before the Khan took the planet. So whatever Nikaea was about, it doesn’t apply to us.
This is, on a careful reading, complete bollocks. A psyker is a psyker. The Khan knew that. The Emperor presumably knew that. Nobody pushed it because the Khan had a reputation for not being told what to do, and because the White Scars were operating on the galactic frontier where the Imperium didn’t have the bandwidth to police every legion’s reading of the rules. So the Stormseers stayed.
This is the move that defines Jaghatai Khan more than any single battle. He found a hyper-technical reading of his father’s order that nobody could be bothered to argue with, kept his psykers, and never had a confrontation about it. The Chogorian habit of refusing central authority survived intact across three centuries of Imperial integration.
The Siege of Terra
When the Heresy actually happened, the Alpha Legion trapped the White Scars in the Chondax system for years against a never-ending Ork waaagh. By the time Khan broke out, the Imperium was a different shape than when he’d left. He went to Prospero, which had just been burned. Magnus appeared as a ghost-projection and asked him to choose a side. Mortarion appeared in person and asked him to choose a side. Khan refused both, declared for the Emperor, and started the longest hit-and-run campaign of the war.
For four years, the Scars harried the traitor advance to Terra. They lost a fifth of the legion doing it, including Qin Xa, the Master of the Keshig and one of the closest people Khan had to a friend in the legion. After Qin Xa died at the Battle of the Kalium Gate, the Khan stopped harrying and started running for home. They found a Webway gate at the Catallus Rift. Yesugei, the chief Stormseer, opened the portal by sacrificing himself. Khan abandoned his flagship, took what was left of the legion through, and reached Terra in time for the Siege.
Once there, the Khan refused to follow Rogal Dorn’s defensive plan. Dorn told him to stay inside the palace walls. Khan didn’t. He led jetbike charges out into the trenches, killed forty Death Guard personally on the first sally, and would have died if Sanguinius hadn’t pulled him out. Eventually Dorn gave up and granted the Khan formal autonomy. There was no other way to manage a primarch who wouldn’t follow orders.
The Khan’s most important contribution to the Siege came in Warhawk, Chris Wraight’s 2021 novel. The Lion’s Gate spaceport had fallen to Mortarion and the Death Guard. Without it, Guilliman’s reinforcements (when they finally arrived) would have nowhere to land. The Khan organised the assembly of what was left of the White Scars plus a hundred tank regiments worth of the 1st Terran Armoured Division and went to take the spaceport back.
The duel that came out of that assault is the best Khan combat scene in the entire Heresy. Mortarion, now a daemon prince, was bigger and stronger and tougher than Khan had ever been. Khan took a Warp-tainted blade for the first time in his life and got sick in a way primarchs aren’t meant to get sick. Mortarion impaled him on Silence, the great daemon-scythe. Khan, dying, pulled himself along the length of the scythe to get face-to-face with his brother and beheaded him in a single movement, banishing Mortarion to the Warp the way you banish a daemon. Then he collapsed, and his honour guard kept fighting until the spaceport was held.
By all mortal standards, the Khan was dead. He survived anyway. He attended the Grand Council of Reconstruction supported by two warriors. After his recovery, he led the White Scars in the Great Scouring against the worlds the traitors had left behind.
The rabbit hole
I tried to map the Khan’s exact post-Heresy timeline late one night during 5th edition, the way you do when you’re putting off painting and you’ve got the laptop on the hobby desk. Started on the Lexicanum page for Khan. Got to the Battle of Corusil V. Got to the Yasan Sector. Got to the Webway. Spent forty minutes on the Webway page reading about how the Aeldari maintain it and how the Drukhari have hidden city-cysts inside it. From there I ended up on a stub article about a Phoenix Lord I’d never heard of, then on a White Dwarf 317 reference list, then on a Russian-language fan wiki for the Heresy that had way more detail about Targutai Yesugei’s last words than the official sources do (or at least appeared to — my Russian’s bad). Closed the laptop at three in the morning. Hadn’t picked up a brush. Pete laughed at me about it for a month.
The thing I came away with, after the rabbit hole, was that there’s no actual canonical text describing what happened to Khan in the Webway. He went in. He didn’t come out. The White Scars believe he’s alive. GW has refused to commit either way for ten thousand years of in-universe time and roughly forty years of real time. Which, incidentally, is roughly how long the Webway pursuit has been canon. The Battle of Corusil V got referenced in Codex: Space Marines (5th edition) and it’s been the same one paragraph ever since.
Will he come back
Probably. Honestly, the Khan is the most narratively load-bearing of the missing loyalists. Guilliman is back. Lion is back. The next ones in the queue are Russ (last seen searching for Horus), Vulkan (last seen on Nocturne with the Forge of Vulkan reactivating), Khan (Webway), and Corax (last seen on his way into the Eye of Terror). Of those four, the Khan has the cleanest narrative on-ramp. The Drukhari are getting more lore attention with every recent codex. The Aeldari restored their galactic role properly in 9th. His return mechanism is the simplest in the entire primarch roster. The Webway already exists. The Khan walks out of one when GW decides he should.
I don’t actually want him to come back.
I started typing that sentence and stopped, because I do want him to come back. I’d just want it written carefully. Khan would arrive at Holy Terra, ignore the High Lords, and ride out alone within a week. The High Lords would assemble committees and the Khan would already be three sectors away. The lore would have to actually build him a place that fits a primarch who refuses to sit still. Which is harder than it sounds, and which is why he’s been “missing in the Webway” for forty years instead of being given a return event already.
Reading order
If you want to actually read the Khan’s arc, the relevant Black Library books are Scars (2014, Chris Wraight, the legion’s break from Chondax and the failed Heresy coup), The Path of Heaven (2016, Wraight again, Catallus and the run for Terra), and Warhawk (2021, Wraight, Lion’s Gate spaceport and the Mortarion duel). Wraight has effectively been the Khan’s biographer for over a decade. His Brotherhood of the Storm (2012 limited release, now collected in Legacies of Betrayal) is the original Wraight Khan piece and still one of the better short stories in the whole Heresy series.
The post-Heresy Webway disappearance has not been written. There’s a Lexicanum stub, a couple of paragraphs in Codex: Space Marines across multiple editions, and ten thousand years of fan speculation. Whatever Black Library is sitting on (assuming they’re sitting on something), they haven’t published a sentence of it.
