Changes

The '''{{PAGENAME}}Invasion of the Stygius Sector''' was a major battle fought by the [[Imperium]], sometime after the [[Thirteenth Black Crusade]].{{Fn|1}}

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 underman 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, as 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 Imperium 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 and sent to defend the Sector, 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 Imperium 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}}

**[[Mordian Iron Guard]] - — 26 [[Regiment]]s**[[Tetrachs 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

**[[Astropath]] Corps - — 3 Companies

**[[Hive|Hive Gang]]s - — Unknown

**[[Space Wolves]] - — 9 [[Great Company|Great Companies]]**[[Iron Hands]] - — 7 Companies**[[Dark Angels]] - — 6 Companies**[[Angels of Redemption]] - — 3 Companies

**[[Skitarii]] - — 5 Legions**[[Legio Cybernetica]] - — 2 Cohorts**[[House Mundast]] - — 2 Households

**[[Space Wolves]] - — 7 Great Companies**[[Iron Hands]] - — 5 Companies**[[Dark Angels]] - — 4 Companies**[[Sons of Medusa]] - — 3 Companies

**[[Tarkan Longrifles]] - — 10 Regiments**[[Mordian Iron Guard]] - — 7 Regiments**[[Tarkan Roughriders]] - — 1 Company**Misc. Imperial Guard - — 12 Regiments**[[Tarkan Brutes]] - — Manufactorum Enforcers

**[[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

**[[Rimenok Ice Warriors]] - — 12 Regiments**[[Rimenok Heavy Armour]] - — 3 Companies**[[Rimenok Beast Trainers]] - — 1 Company**[[Mordian Iron Guard]] - — 5 Regiments

**[[Space Wolves]] - — 4 Great Companies**[[Iron Hands]] - — 3 Companies**[[Dark Angels]] - — 3 Companies

**[[The Faithful]] - — [[Zealot]] band

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

**[[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

**[[Benedictian Guard]] - — 13 Regiments

**[[Morphius Conflock]] - — 9 [[Tzaangor]] Warflocks**[[Pact of Nine Promises]] - — [[Chaos Cult|Seercult]]**[[Masked Brotherhood]] - — [[Chaos Cult|Warcult]]

**[[Reign of Lies]] - — Subverise Division

**[[Conflagral Host]] - — [[Flamers of Tzeentch|Flamer]] Legion**[[Skyscreamers]] - — 3 [[Screamers of Tzeentch|Screamer]] Legions**[[Capering Cohort]] - — 9 Legions**[[Cracklehost of T'zarr]] - — 9 Legions

**[[Thousand Sons]] - — Bulk of Legion

**[[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

**[[House Chromatic]] - — 9 Households*Bastions Crystalline - — 9 Fortresses

*[[Coven of Nine]] - — 2 Exalted Sorcerers

*[[Changebringers]] - — 4 Companies*[[Plogg'cha Conflock]] - — 9 [[Tzaangor]] Warflocks*[[Dark Mechanicum]] - — 3 Legions*[[Legio Proditor]] - — Legion*[[House Arcanus]] - — 3 Households

*[[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*[[Traitor Guard]] of [[Tarkan]] - — 5 Regiments*[[Coven of Disbelief]] - — [[Chaos Cult]]*[[Bolts Arcanite]] - — [[Chaos Cult]]*[[Conjurers of Fear]] - — [[Chaos Cult]]

*{{Endn|1}}: [[Warhammer 40,000 8th Edition Rulebook]], pgs. 164 - 165 - 164–165 — War Zone: Stygius