Bell of Lost Souls - Notable Lost Chapters: Lost Chapters are those unfortunate Adeptus Astartes Chapters that have been destroyed or lost through some misfortune.Some were utterly annihilated in one swift and sudden strike, while others may have slowly diminished over a period of time through attrition or genetic instability of their gene-seed.Information in regards to such Chapters is sometimes lost or garbled during the long millennia and official sources are often all-too scarce. The following is a list of notable Lost Chapters:Chapter NameOriginFoundingNotesAngels ExcelsisBlood AngelsUnknownDestroyed during the Devastation of Baal.Angels GloriousBlood AngelsUnknownDestroyed during the Devastation of Baal.Angels of RetributionUnknownUnknownDestroyed in an ambush on Alantor X. The Officio Assassinorum are believed to have been involved in their destruction.Astral DrakesUnknownUnknownDestroyed by the Ork Warlord Ghazghkull Mag Uruk Thraka.Astral KnightsImperial FistsUnknownChapter was lost when it sacrificed itself against the Necron World Engine during the Battle of Safehold in 926.M41.Black ConsulsUltramarinesSecond FoundingRecorded as annihilated during the Siege of Goddeth Hive by elements of the Word Bearers Traitor Legion in 455.M41. Restored with Primaris Marine reinforcements.Blades EternalUnknownUnknownLost after entering the Eye of Terror in 321.M37 as part of the lamentable Imperial Abyssal Crusade.Blood EaglesBlood AngelsUnknownFought a civil war which resulted in the survivors splitting into two Chapters, the Angels Numinous and Red Seraphs.Blood WingsBlood AngelsUnknownDestroyed during the Devastation of Baal.Brothers of JaradBlood AngelsUnknownDestroyed during the Devastation of Baal.Brazen SkullsUnknownUnknownWiped out as a Chapter by 773.M41. Circumstances unknown. Later refounded during the Ultima Founding.Brothers of the RedBlood AngelsUnknownFatally undone by the genetic Flaw known as the Black Rage. Date unknown.Burning BloodBlood AngelsUnknownDestroyed during the Devastation of Baal.Celestial SwordsUnknownUnknownLost in the 9th Black Crusade.Chorus of EltainUnknownUnknownLost after entering the Eye of Terror in 321.M37 as part of the lamentable Imperial Abyssal Crusade.Crimson AxesImperial FistsUnknownReported as lost as of 092.M39. Circumstances unknown.Crimson ConsulsUltramarinesUnknownDestroyed through the foul machinations of the Alpha Legion Traitor Legion in order to secure their gene-seed stocks, which were delivered to Abaddon the Despoiler and the Black Legion to help replenish their ranks before the unleashing the 13th Black Crusade.Crimson LegionBlood AngelsUnknownChapter destroyed. Most likely undone by their genetic Flaw. Circumstances unknown.Dark PaladinsUnknownThird FoundingFell in battle against Xenos believed to be the Necrons.Emperor's SwordsUnknownUnknownDecimated by the forces of the Alpha Legion after 300 standard years of infiltration and subversion. Another Chapter named the Emperor's Swords, was wiped out in 970.M41 when a massive force of Necrons.Fire HawksUltramarines21st Founding (Cursed Founding)After being nearly driven to extinction during the Badab War, the Fire Hawks' mobile fortress-monastery, the ancient void fortress Raptorus Rex, was lost in the Warp in 963.M41.Fists ExemplarImperial FistsSecond FoundingDepleted during the War of the Beast and later disbanded by its former Chapter Master Maximus Thane.Fists of OlchisUnknownUnknownLost after entering the Eye of Terror in 321.M37 as part of the lamentable Imperial Abyssal Crusade.Golden SonsBlood AngelsUnknownChapter destroyed. Most likely undone by their genetic Flaw. Circumstances unknown.Knights of BloodBlood AngelsUnknownSacrificed themselves during the Devastation of Baal.Knights of EternityUnknownUnknownThe Knights of Eternity were one of many Chapters who sold their lives dearly in the defence of the Imperium against the predations Hive Fleet Kraken in 990.M41.Knights SanguineBlood AngelsUnknownConsumed by war.Lions SableDark AngelsSecond FoundingDuring the unspoken period of history known as the Forgotten Wars (580.M31-632.M32), the ill-fated Lions Sable were completely annihilated during a disastrous campaign into the Eye of Terror whilst in pursuit of the notorious Fallen known as Cypher. Their subsequent fate and entire Chapter history was deliberately destroyed by the Dark Angels.Marines MordantUltramarinesUnknownDestroyed by Alpha Legion.Marines VigilantUnknownUnknownDestroyed by the Crimson Fists Chapter on orders from the High Lords of Terra.Nova LegionUltramarinesUnknownDestroyed by Alpha Legion.Obsidian GlaivesUltramarinesUnknownAnnihilated when their Chapter Homeworld of Obstiria was invaded in 998.M41 by the vast Greenskin hordes of the Red WAAAGH!.Prophets of MercuryUnknownUnknownLost after entering the Eye of Terror in 321.M37 as part of the Imperial Abyssal Crusade.Shadow WolvesImperial FistsUnknownMet their ultimate fate at the hands of a Tyranid splinter fleet in 987.M41 when their homeworld of Varadon was overrun by the xenos swarms.Silver StarsUnknownUnknownUnable to recover enough of the precious Progenoid Glands of their fallen battle-brothers, the Silver Stars could not cultivate further Astartes organ implants to create future generations of Space Marines for the Chapter. The Chapter quickly died off, unable to replace its losses.Sky SentinelsUnknownUnknownDestroyed while defending their Homeworld, from a Chaos invasion led by the Daemon Primarch Magnus.Soul DrinkersUnknownUnknownChapter fell to Chaos and was destroyed. Later refounded during the Ultima Founding.Sons of GideonUnknownUnknownThe Crimson Fists mercilessly destroyed the Sons of Gideon's homeworld of Gideon IV and then hunted down the Sons of Gideon's 3rd Company which had escaped the initial assault.Sons of GorgaxUnknownUnknownUnable to recover enough of the precious Progenoid Glands of their fallen battle-brothers, the Sons of Gorgax died off, unable to replace its losses.Sons of the RavenUnknownUnknownDestroyed by the forces of Chaos in the Sarum Ambush.Star ScorpionsUnknown25th FoundingThe Star Scorpions had the dual misfortune of producing highly mutated gene-seed and being utterly devastated by daemonic entities when the Chapter's fleet became trapped in the Warp.Tiger ClawsAstral ClawsUnknownDeclared destroyed over fourteen centuries earlier and effectively a dead Chapter. Secretly, the survivors joined the Astral Claws Chapter.VeneratorsUnknownUnknownOn Tarinth during the 5th Black Crusade, the Venerators and the Warhawks Chapters were utterly destroyed in the ruins of Kasyr Lutein.VindicatorsUltramarinesUnknownDestroyed by the Alpha Legion.WarhawksUnknownUnknownOn Tarinth during the 5th Black Crusade, the Venerators and the Warhawks Chapters were utterly destroyed in the ruins of Kasyr Lutein.Wolf BrothersSpace WolvesSecond FoundingForcibly disbanded by the Inquisition and the Space Wolves as a result of rampant genetic instability and resulting mutation.