View source for Invasion of the Stygius Sector

{{Battle
|Name         ={{PAGENAME}}
|Image        = Invasion of the Stygian Sector (Codex Iron Hands).jpg
|Image caption=
|Conflict     =
|Date         =???.[[M42]]
|Location     =[[Stygius Sector]]
|Outcome      =Ongoing, Chaos holds most of the [[Sector]]{{Fn|3}}
|Combatant1   =[[File:Aquila1transparent.png|30px]] [[Imperium]]<br>[[File:Rune-Ulthwe.png|20px]] [[Eldar]]
|Combatant2   =<br>[[File:Chaos.png|30px]] [[Forces of Chaos]]
|Commanders1  =[[File:IronHandssymbol.png|20px]] [[Iron Father]] [[Kardan Stronos]]{{Fn|2}}<br>[[File:IronHandssymbol.png|20px]] [[Space Marine Captain|Iron-Captain]] [[Caanok Var]]{{Fn|2}}<br>[[Image:Spacewolvesymbol.png|20px]] [[Vorek Gnarlfist]] (KIA){{Fn|3}}<br>[[Image:Spacewolvesymbol.png|20px]] [[Wolf Lord]] [[Torval Wyrdbane]]{{Fn|3}}
|Commanders2  =[[File:TSRound.png|20px]] [[Daemon Primarch]] [[Magnus]]<br>[[File:TSRound.png|20px]] [[Sorcerer]] [[Kayesh Vrall]] (KIA){{Fn|3}}<br>[[File:Tzeentch mark.png|20px]] [[M'Kachen]]<br>[[File:Tzeentch mark.png|20px]] [[Kairos Fateweaver]]<br>[[File:Tzeentch mark.png|20px]] [[Khardoff]]<br>[[File:Tzeentch mark.png|20px]] [[Shim'dre'lex'kazar]]<br>[[File:Tzeentch mark.png|20px]] [[Amarhotep]]<br>[[File:NightLords.png|20px]] [[Ahrak Deathshriek]]{{Fn|2}}
|Strength1    =See Order of Battle
|Strength2    =See Order of Battle
|Casualties1  =Heavy
|Casualties2  =Unknown
}}
The '''{{PAGENAME}}''' was a major battle fought by the [[Imperium]], sometime after the [[Thirteenth Black Crusade]].{{Fn|1}}

===Overview===
The invasion began after the creation of the [[Great Rift]] during the [[Thirteenth Black Crusade]], when the [[Chaos God]] [[Tzeentch]] grew jealous of its Brother [[Nurgle]]'s newly acquired domain of the [[Scourge Stars]]. While Tzeentch began to undermine Nurgle's control of the Scourge Stars, the Chaos God also wished to corrupt a realm of space for itself and selected the [[Imperium]]'s [[Stygius Sector]] to be its domain. This was due to the fact that Stygius Sector was still awash with [[Warp Storm]]s created by the Great Rift's opening and as a result, the light of the [[Astronomicon]] could no longer be seen there; all of which made the Sector an inviting target for the Chaos God's forces.{{Fn|1}}

The opening phase of the invasion saw [[Cult]] uprisings begin across a score of the Sector's isolated worlds and the actions of the [[Changeling]] added to the Sector's troubles, as the [[Daemon]] traveled from world to world, spreading havoc and confusion. However, it was only when the Stygius Sector's worlds were seething with rebellion that the true invasion began and Tzeentch's [[Daemon]]s and [[Chaos Space Marine]]s were unleashed upon the Sector. With the [[Daemon Primarch]] [[Magnus]] and his [[Thousand Sons]], along with the [[Lord of Change]] [[M'Kachen]] and its [[Great Changehost]] among Tzeentch's forces, three of the Stygius Sector's [[System]]s were swiftly taken; with only the Imperial world [[Mordian]] being able to resist the Chaos God's invasion. Shortly afterwards though, the light of the Astronomicon began to miraculously reach the Sector and its beleaguered defenders immediately sent out a request for aid.{{Fn|1}}

When the Imperium received the request for aid the [[Stygius Crusade]] was hastily assembled, but when it arrived seven sub-sectors had already fallen into Tzeentch's hands. Despite being heavily outnumbered, the Stygius Crusade immediately fought to stem any further losses to the Chaos God's invasion and launched attacks to reclaim the worlds already claimed by Tzeentch's forces. The battles that followed were epic in size and savagery, but though the Crusade was able to break Tzeentch's siege on Mordian, they were hit with several devastating setbacks. Chief among them was that due to the Great Rift and local Warp Storms, the worlds of the Stygius Sector began to mutate into nightmarish realms and several of the Crusade's fleets were lost when they were seized by the [[Warp]] and hurled into the distant past or future. The Warp also claimed the Imperial world [[Dakidda]] and with it, the entire [[44th Necromundan]] [[Regiment]] which had just combat dropped onto the invaded world. This was just the start of the Stygius Crusade's downfall, as Tzeentch's hordes began to overwhelm the Crusade's forces and even the ghosts of the dead rose up to aid the Chaos God's conquest of the embattled sector.{{Fn|1}}

Just as the Crusade began to fall to Tzeentch's might, a large strike force from the [[Craftworld]] [[Ulthwe]] arrived in the Sector without warning and began to push back the Chaos God's forces. The [[Eldar]] did not arrive to aid the Crusade against the forces of [[Chaos]] though. Instead, the Craftworld's [[Seer Council]] contacted the Crusade's commanders and told them they could not save the Stygius Sector and staying there would not aid the Imperium. Indeed, the Seer Council claimed the visions they had received showed only the Crusade's destruction if they stayed and warned that Magnus knew this as well. Despite the mistrust the Imperium had for the Eldar, the Crusade's commanders agreed to retreat and evacuated what forces they could, as Ulthwe's strike force acted as a rearguard against Tzeentch's hordes. Eventually though, the Crusade and Eldar were both forced to retreat and the Stygius Sector became the first of the domains Tzeentch planned on claiming for itself.{{Fn|1}}

====Second Relief of Mordian====
As Imperial forces withdrew from the Stygius Sector the [[Iron Hands]] refused to retreat and instead gathered on [[Mordian]], itself under siege from Chaos forces. Alongside a mere dozen or so [[Regiment]]s of the [[Mordian Iron Guard]], the Iron Hands sought to reforge themselves and purge their weakness displayed earlier in the campaign. During the Siege the Iron Hands were joined by allies enraged by the defeatism of the Imperial forces, among them the [[Brazen Claws]], [[Fire Lords]], [[Silver Skulls]], [[Sons of Medusa]], and [[Iron Lords]] in what became known as the Iron Crusade. They arrived on Mordian to find the planet terrorized by a [[Night Lords]] warband under [[Ahrak Deathshriek]] and his [[Chaos Raptor|Raptor]] hordes. Deathshriek planned to use the terror to power a ritual that would plunge the entire world into the Warp.{{Fn|2}}

The Iron Hands and their allies struck with customary bluntness, emerging without warning from the Warp and engaging the traitor fleet in orbit and launching a [[Drop Pod]] assault on Mordian's capital. [[Clan Avernii]] under [[Iron Captain]] [[Caanok Var]] led the charge and Deathshriek drove his [[Cultist]]s into their guns. One by one, the remaining Iron Hands Clan Companies joined the battle and Deathshriek was wounded in single battle by Iron Captain Var. Even as the Iron Hands drop zone came under fresh assault from [[Benedictian Guard]] and the [[Cult of the Whispered Word]], renegade Warlords from across the sector united in their realization that the Iron Hands could be wholly destroyed. With their assault faltering Deathshriek claimed victory as he led his fleet against the Iron Hands in space, outnumbering their ships three to one. It was at this point that the Iron Hands [[Successor Chapter]]s arrived. Deathshriek's armada was caught in disarray and crushed. The loyalist ships rained obliteration below and to
the Mordian populace the bombardment must have seemed
indiscriminate, but nothing could have been further from
the truth. The doctrine of Hammer and the Storm had been
pursued planetside as well as in the trackless void, the Iron
Hands’ assault calculated to stir the renegades and traitors into
reckless deeds. What had seemed a faltering advance had merely
paused while Techmarines labored to erect void shields and
reinforce the capitol’s surviving bunkers. Thus the Iron Hands
and those portions of the populace they deemed worthy of
survival endured the firestorm. Their foes, caught in the open
and drunk on the prospect of imminent victory, were not so
fortunate. In a little over one standard hour’s bombardment, the
Chaos hold on Mordian was broken for the second time. Eventually other Imperial reinforcements arrived from [[Cypra Mundi]] and the Iron Crusade was able to not only push Chaos forces off Mordian, but to counterattack into nearby worlds.{{Fn|2}}

Initial projections of a recoverable situation were methodically reassessed, and the Iron Council concluded that the inconstant xenos of [[Ulthwé]] had crafted a self-fulfilling
prophecy to the detriment of Mankind. [[Kardan Stronos]] in particular came to believe that had the Imperial forces held their ground, four of the six systems could have been held for acceptable cost. This, he now revised to two. The warp corridor between Mordian and Cypra Mundi had proven resistant to the grasp of the [[Noctis Aeterna]] offering a ready supply of materiel from the forge world, but this alone would not be enough. The bounteous worlds of the neighboring [[Khravos System]] would have to have to be secured – a campaign whose outcomes fell well within acceptable parameters. Thus ignoring Eldar prophecies insisting doom, the Iron Council unleashed a second phase of the campaign, with a plan to scour the surviving worlds of the Mordian System and wresting the refineries and shipyards of Kharvos from Chaos. As of now, the battle continues.{{Fn|2}}

====The Shadow Wolf====
During the war, the [[Space Wolves]] [[Wolf Lord]] of the [[Ironwolves]], [[Vorek Gnarlfist]], was killed by the forces of the Thousand Sons. His successor [[Torval Wyrdbane]] of the [[Duskwolves]] has launched a bloody campaign of vengeance against the sons of Magnus. Dubbed the Shadow Wolf, Wyrdbane has provided hope to the Imperium's besieged citizens amidst the ever-swelling tide of misery. He has taken the heads of no fewer than four [[Sorcerer]]s, most notably [[Kayesh Vrall]] on [[Kalimar]].{{Fn|3}}

===Order of Battle===
====Imperial-Eldar{{Fn|1}}====
On [[Mordian]]
*[[Imperial Guard]]
**[[Mordian Iron Guard]] — 26 [[Regiment]]s
**[[Tetrarchs Guard]] — 12 Regiments
**[[Nigrellum Guard]] — 8 Regiments
**[[PDF|Mordian Defence Force]] — 18 Regiments
**Mordian [[Penal Legion|Penal Battalions]] — 3 Regiments
**Mordian Super-Heavy Battalion — 5 Companies
*[[Inquisition]]
**[[Ordo Xenos]] contingent
**[[Ordo Hereticus]] contingent
**[[Ordo Malleus]] contingent
*[[Adeptus Astra Telepathica]]
**[[Astropath]] Corps — 3 Companies
*Miscellaneous
**[[Hive|Hive Gang]]s — Unknown

Mordian relief force:
*[[Space Marines]]
**[[Space Wolves]] — 9 [[Great Company|Great Companies]]
**[[Iron Hands]] — 7 Companies
**[[Dark Angels]] — 6 Companies
**[[Angels of Redemption]] — 3 Companies
**[[Fire Lords]]{{Fn|2}}
**[[Silver Skulls]]{{Fn|2}}
**[[Brazen Claws]]{{Fn|2}}
**[[Iron Lords]]{{Fn|2}}
**[[Sons of Medusa]]{{Fn|2}}
*[[Adeptus Mechanicus]]
**[[Skitarii]] — 5 Legions
**[[Legio Cybernetica]] — 2 Cohorts
**[[House Mundast]] — 2 Households

Assault on [[Tarkan]]
*[[Space Marines]]
**[[Space Wolves]] — 7 Great Companies
**[[Iron Hands]] — 5 Companies
**[[Dark Angels]] — 4 Companies
**[[Sons of Medusa]] — 3 Companies
*[[Imperial Guard]]
**[[Tarkan Longrifles]] — 10 Regiments
**[[Mordian Iron Guard]] — 7 Regiments
**[[Tarkan Roughriders]] — 1 Company
**Misc. Imperial Guard — 12 Regiments
**[[Tarkan Brutes]] — Manufactorum Enforcers

Operation Prismata
*[[Space Marines]]
**[[Space Wolves]] — 2 Great Companies
**[[Iron Hands]] — 4 Companies
**[[Brazen Claws]] — 4 Companies
**[[Dark Angels]] — 5 Companies
**[[Angels of Vengeance]] — 5 Companies
**[[Consecrators]] — 5 Companies
**[[Grey Knights]] — Unknown
*[[Sisters of Silence]] — Unknown

Disaster at [[Rimenok]]
*[[Imperial Guard]]
**[[Rimenok Ice Warriors]] — 12 Regiments
**[[Rimenok Heavy Armour]] — 3 Companies
**[[Rimenok Beast Trainers]] — 1 Company
**[[Mordian Iron Guard]] — 5 Regiments
*[[Space Marines]]
**[[Space Wolves]] — 4 Great Companies
**[[Iron Hands]] — 3 Companies
**[[Dark Angels]] — 3 Companies
*[[Ecclesiarchy]]
**[[The Faithful]] — [[Zealot]] band

[[Eldar]] forces
*[[Ulthwe]]
**[[Seer Council]]
**[[Black Storm]] — 4 Warhosts
**[[Lileath's Blade]] — 1 Skyhost
**[[Serpent Striking]] — 1 [[Aspect Warrior]] Warhost
**[[Duality of Purpose]] — 2 [[Revenant Titan]]s

====Chaos{{Fn|1}}====
On [[Mordian]]
*[[Chaos Space Marines]]
**[[Coven of Many Eyes]] — [[Sorcerer]]s
**[[Coven of Nine]] — 6 Exalted [[Sorcerer]]s
**[[Night Lords]] — 5 [[Chaos Warband|Warband]]s
**[[Knights of the Silver Tower]] — 3 Companies
**[[Oracles of Change]] — Warband
*[[Lost and the Damned]]
**[[Benedictian Guard]] — 13 Regiments
**[[Nochfell Black Guard]]
**Engines Arcana - 12 Batteries
**Spellcannon of Tlaxx - 3 Batteries
**[[Morphius Conflock]] — 9 [[Tzaangor]] Warflocks
**[[Pact of Nine Promises]] — [[Chaos Cult|Seercult]]
**[[Masked Brotherhood]] — [[Chaos Cult|Warcult]]
**[[Cult of the Whispered Word]]
**[[Reign of Lies]] — Subverise Division
*[[Daemon]]s
**[[Conflagral Host]] — [[Flamers of Tzeentch|Flamer]] Legion
**[[Skyscreamers]] — 3 [[Screamers of Tzeentch|Screamer]] Legions
**[[Capering Cohort]] — 9 Legions
**[[Cracklehost of T'zarr]] — 9 Legions
**[[Pyroclastic Conclave]]
**[[Warpchild]] - Massive summoned entity

On [[Dhobash System|Dhobash]], commanded by [[Magnus the Red]]
*[[Chaos Space Marine]]s
**[[Thousand Sons]] — Bulk of Legion
*[[Daemon]]s
**[[Host of a Thousand Names]] — 9 Legions
**[[Congregation of Flame]] — 9 Legions
**[[Unbound]] — 9 Legions
**[[Doom Wing]]s — 5 Wings
**[[Talons Iridescent]] — 5 Wings
*[[Dark Mechanicus]] — 6 Legions
*[[Chaos Knight]]s
**[[House Chromatic]] — 9 Households
*Bastions Crystalline — 9 Fortresses

On [[Prismata System|Prismata]]
*[[Coven of Nine]] — 2 Exalted Sorcerers
*[[Cult of Bluefire]]
*[[Cult of Coldflame]]
*[[Changebringers]] — 4 Companies
*[[Plogg'cha Conflock]] — 9 [[Tzaangor]] Warflocks
*[[Dark Mechanicum]] — 3 Legions
*[[Legio Proditor]] — Legion
*[[House Arcanus]] — 3 Households

On [[Rimenok]], commanded by [[Fateweaver]]
*[[Thousand Sons]] — Bulk of Legion
*[[League of Change]] — Daemonic coven
*[[Banner of Many Eyes]] — 9 Legions
*[[Takons of Change]] — 9 Legions
*[[Mutagenics]] — 9 Legions
*[[House Chromatic]] — 9 Households
*[[Warriors Resplendent]] — 5 Companies
*[[Talons Iridescent]] — 5 Wings
*[[Traitors of Tarkan]] — 5 Regiments
*[[Coven of Disbelief]] — [[Chaos Cult]]
*[[Bolts Arcanite]] — [[Chaos Cult]]
*[[Conjurers of Fear]] — [[Chaos Cult]]

===Source===
*{{Endn|1}}: [[Warhammer 40,000 8th Edition Rulebook]], pgs. 164–165 — ''War Zone: Stygius''
*{{Endn|2}}: [[Codex Supplement: Iron Hands (8th Edition)]] pgs. 32-33
*{{Endn|3}}: [[Codex Supplement: Space Wolves (10th Edition)]], pgs. 19-23

[[Category:Battles (Chaos)]]
[[Category:Battles (Imperium)]]
[[Category:Battles (Craftworld Eldar)]]
[[Category:Battles (Space Wolves)]]
[[Category:Battles (Dark Angels)]]
[[Category:Battles (Iron Hands)]]
[[Category:Battles (Astra Militarum)]]
[[Category:Battles (Grey Knights)]]
[[Category:Battles (Sisters of Silence)]]
[[Category:Battles (Adeptus Mechanicus)]]
[[Category:Battles (Night Lords)]]
[[Category:Battles (Thousand Sons)]]
[[Category:Battles (Dark Mechanicus)]]
[[Category:Battles (Daemons)]]
[[Category:Battles (Mordian Iron Guard)]]
[[Category:Black Crusades]]
[[fr:Invasion du Secteur Stygius]]