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Battles of the Horus Heresy (List)

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  • A listing of known campaigns and battles of note during the Horus Heresy. This listing is not exhaustive and is presented merely for interest and comparison.
  • Attempt has been made to present the unsorted listing in chronological order. However, due to the nature of the way the timing information is presented in the source texts (often nebulously and even contradictory), the chronological order must only be taken as a rough guide.
  • Several campaign names are currently presumed.
  • See also:
Battle/Campaign Location Combatant(s) 1 Combatant(s) 2 Outcome Source(s)
Battle of Isstvan III Isstvan III Sons of Horus
Emperor's Children traitors
Death Guard traitors
World Eaters traitors
Legio Mortis
Luna Wolves
Emperor's Children loyalists
Death Guard loyalists
World Eaters loyalists
Traitor victory Galaxy in Flames
Flight of the Eisenstein Eisenstein Death Guard traitors Death Guard loyalists Loyalist victory The Flight of the Eisenstein
Burning of Prospero Prospero Thousand Sons
Prospero Spireguard
Space Wolves
Adeptus Custodes
Sisters of Silence
Loyalist victory, Thousand Sons escape Prospero Burns (Novel)
War Within the Webway Webway/Imperial Palace Custodian Guard
Sisters of Silence
Daemons Webway portal sealed
Battle of the Rangda System Rangda System Dark Angels Sons of Horus Pyrrhic traitor victory
Battle of the Somnus Citadel Luna Daemonic infestation Death Guard loyalists
Sisters of Silence
Loyalist victory The Flight of the Eisenstein
Battle of Diamat Diamat Dark Angels
Loyal Imperial Army
Traitor Imperial Army
Sons of Horus
Dark Mechanicum
Loyalist tactical victory Fallen Angels
Drop Site Massacre Isstvan V Iron Hands
Raven Guard
Salamanders
Imperial Army
Sons of Horus
Emperor's Children
World Eaters
Death Guard
Word Bearers
Night Lords
Iron Warriors
Alpha Legion
Legio Mortis
Traitor Army
Traitor victory Fulgrim
The First Heretic
Raven's Flight
Shadow Wars Galaxy-wide Shattered Legions
Knights-Errant
Blackshields
Traitor Legions
Blackshields
inconclusive
Battle of Signus Prime Signus Prime Daemons of Khorne Blood Angels Imperial pyrrhic victory Fear to Tread
Schism of Mars Mars Dark Mechanicum
Legio Mortis
Martian Mechanicum
Legio Tempestus
Imperial Fists
Imperial Army
Traitor victory Mechanicum
Treachery at Advex-Mors Advex-Mors Dark Angels Sons of Horus Strategic traitor victory White Dwarf 470, pg. 101
Great Siege of Lesser Damantyne Lesser Damantyne Iron Warriors traitors Iron Warriors loyalists Traitor technical victory Age of Darkness
Invasion of Paramar V Paramar V Alpha Legion
Legio Fureans
Dark Mechanicum
Adeptus Mechanicus
Legio Gryphonicus
Loyalist Iron Warriors
Traitor victory
Battle of the Coronid Deeps Coronid Deeps Sons of Horus
Death Guard
Dark Mechanicum
Imperial Army
Adeptus Mechanicus
Loyalist Knight Houses
Adeptus Mechanicus
Stalemate
Battle of the Phall System Phall System Iron Warriors Imperial Fists Pyrrhic Iron Warriors victory
Battle of Ravendelve Kiavahr Raven Guard
Mechanicum
Collegia Titanica
Alpha Legion
Tech-Priest rebels
Strategic traitor victory
Carandiru Uprising Carandiru Raven Guard Sons of Horus
Emperor's Children
Loyalist victory
Ruin of Maerdan Maerdan Legio Gryphonicus
Legio Metalica
Legio Destructor
Legio Mortis
Legio Argentum
Legio Vulturum
Indecisive
Battle of the Alaxxes Nebula Alaxxes Nebula Space Wolves
Dark Angels
Alpha Legion Loyalist escape
Pale Stars Campaign Pale Stars Blood Angels
Salamanders
White Scars
Mechanicum
Imperial Army
Alpha Legion
Emperor's Children
Dark Mechanicum
Traitor Army
Daemons
Cultists
mass desvatation
Traoris Raid Traoris Salamanders survivors Word Bearers indecisive
Battle of the Perfect Fortress Narsis Emperor's Children Imperial Army
Raven Guard
Loyalist victory
Chondax Campaign Chondax System Alpha Legion
Orks
White Scars Loyalist Escape
Second Battle of Prospero Prospero System White Scars Loyalists Death Guard
White Scars Traitors
Loyalist victory
First Siege of Hydra Cordatus Hydra Cordatus Iron Warriors Imperial Fists Traitor victory
Battle of the Furious Abyss Furious Abyss Ultramarines
Space Wolves
World Eaters loyalists
Thousand Sons loyalists
Saturnine Fleet
Word Bearers Imperial pyrrhic victory Battle for the Abyss
Battle of Calth Calth Word Bearers
Daemons
Ultramarines
Imperial Army
Imperial pyrrhic victory Know No Fear
Shadow Crusade Ultramar
Nuceria
World Eaters
Word Bearers
Ultramarines Traitor victory
Betrayal at Ithraca Ithraca Legio Praesagius
House Orhlacc
Word Bearers
Legio Infernus
Traitor victory Adeptus Titanicus: Shadow and Iron pg.7
Death of Canopus Canopus Blood Angels
Iron Hands
Sons of Horus Mutual destruction
Crusade of Iron Ultramar Loyalist Mechanicum
Loyalist Knight Houses
Loyalist Imperial Army
Dark Mechanicum
Traitor Titan Legions
Renegade Knights
Traitor Imperial Army
Crusade of Iron Adeptus Titanicus: Shadow and Iron pg.7-15
Doom of Bormina Bormina Legio Praesagius
House Orhlacc
Legio Audax Unknown Adeptus Titanicus: Shadow and Iron pg.10
Defence of Tyros Tyros Legio Praesagius
Ordo Sinister
Legio Mordaxis
House Ærthegn
Loyalist victory Adeptus Titanicus: Shadow and Iron pg.10
Defence of the Three Planets Three Planets House Vornherr
House Vyronii
Traitors
Blackshield Knight Houses
Unknown Adeptus Titanicus: Shadow and Iron pg.9
Battle of Ulixis Ulixis Legio Lysanda
Legio Oberon
Imperial Army
Legio Infernus
Dark Mechanicum
Loyalist victory Adeptus Titanicus: Shadow and Iron pg.10
Ambush on Espandor Espandor Legio Praesagius
Legio Oberon
Ordo Sinister
Imperial Army
Legio Infernus
Legio Audax
Traitor victory Adeptus Titanicus: Shadow and Iron pg.11
Battle of Aquila Atoll Zarathusa Secundus Legio Lysanda
House Vornherr
Imperial Army
Legio Mordaxis Traitor victory Adeptus Titanicus: Shadow and Iron pg.13-14
Battle of Drooth II Drooth II Legio Praesagius
Legio Lysanda
Legio Oberon
Ordo Sinister
Legio Infernus
Legio Audax
Legio Mordaxis
Dark Mechanicum
Indecisive Adeptus Titanicus: Shadow and Iron pg.14
Percepton Campaign Ultramar Word Bearers Ultramarines Exterminatus
Battle of Armatura Armatura Word Bearers
World Eaters
Ultramarines Traitor victory
Battle of Iydris Iydris Emperor's Children
Iron Warriors
Eldar
Shattered Legions
Traitor victory
Thramas Crusade Thramas Sector Dark Angels Night Lords Imperial victory Age of Darkness
Fall of Baztel III Batzel III Space Wolves Daemons Webway portal sealed
Battle of Vannaheim Vannaheim Space Wolves Iron Warriors Traitor Victory
Battle of Constanix II Constanix II Raven Guard Dark Mechanicum
Word Bearers
Loyalist victory
Mezoan Campaign Mezoa Salamanders
Mechanicum
Imperial Fists
Iron Warriors
Alpha Legion
Loyalist victory
Battle of Bodt Bodt Iron Hands
Imperial Fists
Solar Auxilia
World Eaters
Dark Mechanicum
Loyalist victory
Isessos Genocide Isessos System Alpha Legion Local Imperial Defenders Mass famine, 90 billion dead
Battle of Dwell Dwell Sons of Horus Iron Hands
White Scars
Salamanders
Imperial Army
Mechanicum
Traitor victory
Battle of Molech Molech Sons of Horus
Death Guard
House Devine
Ultramarines
Blood Angels
Collegia Titanica
Knight Houses
Imperial Army
Traitor victory Vengeful Spirit (Novel)
Burning of Ohmn-Mat Ohmn-Mat Sons of Horus
Word Bearers
Traitor Imperial Army
Daemons
Mechanicum
Iron Hands
Mutual destruction
Bitter War Colchis region Ultramarines
Iron Hands
Imperial Fists
loyalist Thousand Sons
Word Bearers Imperial victory
Siege of Baal Baal Blood Angels
Imperial Fists
Salamanders
Iron Hands
Sons of Horus
Emperor's Children
Dark Mechanicum
Loyalist Victory White Dwarf 470, pg. 103
Reaving of the Xibana Reaches Xibana Reaches Sub-Sector Blood Angels
Iron Hands
Sons of Horus Loyalist victory
Breaking of Anvillus Anvillus Various Mechanicum factions Various Mechanicum factions Unclear outcome Horusheresy.com galactic timeline (last accessed 2/6/2022)
Xana Incursion Xana Loyalist Legions
Blackshields
Dark Mechanicum Loyalist victory
Carnage of Morox Morox Excellus Loyal Imperial Army Traitor Imperial Army Loyalist Pyrrhic victory
Sangraal Campaign Herkaliaum Imperial Fists
Imperial Army
Dark Mechanicum Loyalist victory
Battle of Arissak Arissak System Shattered Legions Sons of Horus Traitor victory
Battle of Perditus Perditus System Dark Angels
Iron Hands
Death Guard Loyalist victory
Battle of Sotha Sotha Night Lords Ultramarines Loyalist tactical victory
Siege of Inwit Inwit Imperial Fists Traitor Armada Inwit endures Horusheresy.com Galaxy Timeline
Thassos Incident Thassos System Dark Angels
Shattered Legions
Night Lords Loyalist victory
Wolf King's Fury Vezdell Secundus Space Wolves Alpha Legion
Traitor Imperial Army
Loyalist victory
Lorin Alpha Campaign Lorin Alpha region White Scars Emperor's Children
Dark Mechanicum
Traitor Victory Horusheresy.com Galaxy Timeline
Drussen Atrocity Drussen Unknown Loyalists Unknown Traitors Unknown
Scouring of Gilden's Star Gilden's Star System Blood Angels] Word Bearers inconclusive
Battle of Nyrcon Beta-Garmon System Salamanders
Imperial Army
Legio Astorum
Emperor's Children
Legio Mortis
Loyalist victory
Battle of Tallarn Tallarn Iron Warriors Misc. Imperial Forces Imperial victory Tallarn: Executioner
Tallarn: Ironclad
Cataclysm of Iron Segmentum Pacificus/Segmentum Tempestus Loyalist Mechanicum Dark Mechanicum Indecisive
Battle of Tralsak Tralsak Legio Atarus
Legio Agravides
Shattered Legions
Legio Magna
Legio Victorum
World Eaters
Indecisive
Tarren Suppression Tarren IV Legio Defensor
Imperial Army
rebels
Emperor's Children
Legio Cybernetica
Legio Mortis
Traitor victory
Balthor Sigma Intervention Balthor Sigma Legio Osedax
Eldar
World Eaters Indecisive
Scouring of the Ollanz Cluster Ollanz Cluster Legio Astorum
Iron Hands
Legio Fureans
Emperor's Children
Loyalist victory
Battle of Nocturne Nocturne Death Guard Salamanders Loyalist victory
War of Drakes Nocturne region Death Guard Salamanders|Loyalist victory
Haddon Campaign Haddon System Iron Warriors ??? Traitor victory
Jarrazr Incursion Jarrazr Sisters of Silence Chaos Loyalist victory
Malagant Conflict Malagant Raven Guard
Imperial Army
Death Guard Loyalist Victory
Erellian Subjugation Erellia Iron Hands
Salamanders
Emperor's Children Unknown White Dwarf 470, pg. 105
Battle of Honourum Honourum Ultramarines Word Bearers Loyalist Pyrrhic victory
Battle of the Kalium Gate Kalium Gate White Scars Emperor's Children Traitor tactical victory
Battle of Catallus Catallus Rift White Scars Death Guard
Emperor's Children
Daemons
Loyalist escape
Siege of Cthonia Cthonia Imperial Fists Sons of Horus Stalemate White Dwarf 470, pg. 105
Axandrian Incident Axandria IV Thousand Sons Imperial Fists
Adeptus Custodes
Traitor strategic victory White Dwarf 470, pg. 105
Battle of Zepath Ultramar Dark Angels Word Bearers
World Eaters
Loyalist victory
Battle of Kalleth Kalleth Night Lords Ashen Claws Pyrrhic traitor victory
Second Zaramund Campaign Zaramund Fallen Angels Imperial Fists Fallen victory Luther: First of the Fallen (Novel), Tale of the Traitor
Foricaan Campaign Foricaan System Iron Hands
Salamanders
Iron Warriors Mutual Destruction
Solar War Sol System Loyalist Legions
Imperial Army
Mechanicum
Traitor Legions
Dark Mechanicum
Traitor Imperial Army
Traitor Victory
Battle of Pluto Pluto Imperial Fists
Imperial Army
Alpha Legion Imperial victory
Battle of Desperation Desperation Night Lords Ultramarines
Ashen Claws
Indecisive
Harrowing of Pyrrhan Pyrrhan Ultramarines
Blood Angels
Dark Angels
Daemons Loyalist Victory
Second Battle of Davin Davin Blood Angels
Ultramarines
Dark Angels
Daemons Loyalist Victory
Subjugation of Tyrinth Tyrinth Commonwealth Death Guard Tyrinth Forces Traitor Victory
Argolian Massacres Argolian Sub-Sector Word Bearers Refugees Traitor Victory
Battle of Trisolian Trisolian System Space Wolves
Adeptus Mechanicus
Sons of Horus
World Eaters
Iron Warriors
Night Lords
Alpha Legion
Word Bearers
Dark Mechanicum
Loyalist escape
Battle of Absolom Absolom Adeptus Mechanicus Dark Mechanicum Traitor Victory
Battle of Krade Krade Iron Warriors Ultramarines
Imperial Army
Traitor Retreat
Battle of Beta-Garmon Beta-Garmon Collegia Titanica
Skitarii
Taghmata Omnissiah
Knights
Imperial Fists
Blood Angels
White Scars
Salamanders
Imperial Army
Sons of Horus
Dark Mechanicum
Renegade Knights
Iron Warriors
Word Bearers
Emperor's Children
Traitor Imperial Army
Lost and the Damned
Traitor victory
Battle of Yarant Yarant III Space Wolves
Raven Guard
Sons of Horus
Alpha Legion
Thousand Sons
World Eaters
Loyalist escape
Battle of Heta-Gladius Heta-Gladius Sons of Horus Imperial Fists
Blood Angels
Imperial Armada
Traitor withdrawal
Battle of Deluge Deluge Iron Warriors
World Eaters (later)
World Eaters(at first)
Ultramarines
Imperial Armada
Traitor escape
Purging of Ynyx Ynyx Death Guard Mechanicum
Imperial Army
Traitor Victory
Battle of Anuari Ultima Segmentum Ultramarines Word Bearers
World Eaters
Night Lords
Loyalist Victory
Battle of the Aragna Chain Aragna Chain Iron Hands
Salamanders
Raven Guard
Sons of Horus Traitor Victory
Battle of the Diavanos System Diavanos System World Eaters Ultramarines Loyalist victory
Battle of Thagria Thagria Mechanicum
Dark Angels
Dark Mechanicum Loyalist victory
Battle of the Carchera System Carchera System Ultramarines Iron Warriors Loyalist victory
Burning of Vrexor Vrexor Sub-Sector Adeptus Mechanicus Dark Mechanicum
Dawn of Desolation Galaspar Space Wolves Death Guard loyalist victory
Battle of Luth Tyre Luth Tyre Dark Angels Death Guard
Iron Warriors
Loyalist victory
Siege of Barbarus Barbarus Dark Angels
Space Wolves
Raven Guard
Death Guard
Sons of Horus
Iron Warriors
Loyalist victory
Battle of Zhao-Arkhad Zhao-Arkhad Dark Angels Thousand Sons
Zhao-Arkhad Mechanicum
Legio Xestobiax
Zhao-Arkhad victory
Death of Chemos Chemos Dark Angels Emperor's Children Loyalist Victory
Liberation of Saronican Saronican Gulf Ultramarines
Solar Auxilia
World Eaters Loyalist victory
Ydursk Incident Ydrusk Raven Guard Traitor Imperial Army Loyalist victory
Scouring of the Pale Stars Pale Stars Salamanders Emperor's Children Traitor Victory
Raid on Luna Luna Shattered Legions Dark Mechanicum
Sons of Horus
Tactical traitor victory, Strategic loyalist victory
Battle of Terra Terra Sons of Horus
Emperor's Children
Death Guard
World Eaters
Word Bearers
Night Lords
Iron Warriors
Thousand Sons
Dark Mechanicum
Traitor Titan Legions
Renegade Knights
Daemons
Traitor Army
Imperial Fists
Blood Angels
White Scars
Mechanicum
Collegia Titanica
Knights
Imperial Army
Custodian Guard
Sisters of Silence
Imperial Pyrrhic victory Collected Visions