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Death of Chemos

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The Death of Chemos occurred during the Horus Heresy, when the Dark Angels destroyed the Emperor's Children's Homeworld, Chemos, in 12.M31.[1a]


It began when the vengeful Dark Angels' vast armada entered the Chemos System and swept aside the defense fleet the Emperor's Children left to protect the System. The Legion left only the wrecks of venerable warships and frozen corpses in their wake until the Dreadwing were sent to invade Chemos. They were unleashed en masse and engaged the traitor legion's garrison while also planting seismic macro-charges of immense potency in key locations on the world. Though they were outnumbered, the Emperor's Children fought fiercely in defense of their homeworld and inflicted heavy casualties on the invaders. The Dreadwing, however, were merciless in the prosecution of attacks on strategic targets and scoured enemy strongholds of all life using weapons born of humanity's darkest nightmares. When their objectives were completed, they returned to the Dark Angels' fleet and remotely detonated the planted seismic macro-charges.[1a]

The resulting explosions caused a chain of catastrophic explosions that began the destruction of Chemos. The world's tectonic plates split apart, which created kilometers-deep canyons that swallowed Chemos's glittering metropolises into their cavernous depths. At the height of the world's cataclysm, the Dark Angels' orbiting fleet then began an orbital bombardment. The legion's spread of cyclonic torpedoes struck at predetermined weak spots across Chemos's surface and even somehow detonated within its core. This caused the Emperor's Children's once proud homeworld to break apart and sent colossal slabs of its remains tumbling through space. Before the Dark Angels departed, the Legion declared the Chemos System Perdita and placed warning beacons around its boundaries. Upon their activation, the devices promise the Dark Angels will deliver swift retribution upon any trespassers within the system[1a]. Elements of the Emperor's Children that fled Chemos's destruction later invaded the Pale Stars region and came into conflict with the Salamanders.[1b]


  • 1: White Dwarf 478 - Horus Heresy: The Passage of the Angel of Death
    • 1a: pg. 104 - The Death of Chemos
    • 1b: pg. 105 - The Scouring of the Pale Stars

Battles of the Horus Heresy
005-006.M31 Battle of Isstvan IIIFirst Battle of ProsperoWar Within the WebwayBattle of the Somnus CitadelUnrest on CalibanSchism of MarsBattle of DiamatDrop Site MassacreBattle of the Rangda SystemFirst Battle of ParamarManachean WarSignus CampaignTreachery at Advex-MorsSiege of CthoniaBattle for Felweather Keep‎
007-008.M31 Battle of PhallBattle of RavendelveRuin of MaerdanBattle of the Alaxxes NebulaPale Stars CampaignBreaking of the Perfect FortressChondax CampaignSecond Battle of ProsperoFirst Siege of Hydra CordatusBattle of the Furious AbyssBattle of CalthBattle of ArmaturaBetrayal at IthracaDeath of CanopusShadow CrusadeCrusade of IronDoom of BorminaDefence of TyrosDefence of the Three PlanetsBattle of UlixisAmbush at EspandorBattle of Aquila AtollBattle of Drooth IIPercepton CampaignBattle of IydrisThramas CrusadeFall of Baztel IIIBattle of VannaheimSecond Battle of ParamarBattle of Constanix IIMezoan CampaignBattle of BodtBattle of DwellErellian SubjugationSiege of Baal
009-010.M31 Battle of MolechBreaking of AnvillusXana IncursionCarnage of MoroxSangraal CampaignBattle of ArissakBattle of PerditusBattle of SothaDrussen AtrocityScouring of Gilden's StarBattle of NyrconBattle of TallarnCataclysm of IronBattle of NocturneWar of DrakesBattle of PlutoSiege of InwitBurning of Ohmn-MatBitter War
011-014.M31 Reaving of the Xibana ReachesLorin Alpha CampaignSubjugation of TyrinthMalagant ConflictBattle of the Kalium GateBattle of CatallusAxandrian IncidentBattle of the Haddon SystemJarrazr IncursionBattle of TralsakTarren SuppressionBalthor Sigma InterventionBattle of AbsolomScouring of the Ollanz ClusterBattle of ZepathSecond Battle of ZaramundBattle of AnuariBattle of PyrrhanSecond Battle of DavinArgolian MassacresBattle of TrisolianBattle of YarantBattle of KradeBattle of DelugeBattle of Heta-GladiusBattle of the Aragna ChainBattle of KallethBattle of the Diavanos SystemBattle of DesperationBattle of Beta-GarmonWar for AgaropsDefence of RyzaBattle of ThagriaPassage of AngelsThassos IncidentBattle of Zhao-ArkhadSerpent's CoilSiege of BarbarusForicaan CampaignBattle of VezdellBurning of VrexorDawn of DesolationDeath of ChemosBattle of Luth TyreYdursk IncidentFall of TenzebarSolar WarRaid on LunaSiege of TerraGreat Scouring