Extinct chapters

This page is dedicated in remembrance of all those Space Marine Chapters that are entirely and definitely very dead. This does not include chapters that fell to Chaos, so all those lost (wiped out, turned heretic, barely survived or still missing) during the Abyssal Crusade aren't listed here, for that see Judged. Special mentions to the 2 lost legions.

Astral Knights

Sacrificed their chapter to destroy the Necrons' World Engine in 926.M41.

Crimson Castellans

This chapter was fighting against renegades from their own chapter when a Tyranid Hive Fleet came by and ate them both.

Crimson Consuls

Seriously, don't put crimson in the chapter's title if you want it to live. Supposedly this chapter was taken out piece by piece by an Alpha Legionairre.

Dark Paladins

Annihilated by Necrons while investigating Jarrman Prime.

Emperor's Swords

Destroyed by the Alpha Legion who contaminated their recruiting pool and implanted subconscious triggers in their recruits.

Emperor's Swords again

Based on Bellicas, which turned out to be a tomb world. Begin face-palming.

Fire Hawks

Lost in the warp. Surviving members may or may not make up the Legion of the Damned.

Fists Exemplar

Discretely replaced the completely depleted Imperial Fists after The War of The Beast with their records purged.

Flame Falcons

Declared excommunicate traitoris by the Inquisition and officially extinguished by Grey Knights. Few survived.

Imperial Fists

Destroyed in War of The Beast, secretly replenished with Fists Exemplar.

Knights of Blood

Sacrificed to a man in a desperate effort to protect Baal from the Tyranid and Khorne-Daemon smackdown. Due to their reputation as borderline-heretics, it wasn't rebuilt in the Ultima Founding.

Knights of Eternity

Another chapter presumed to have been eaten by the Kraken.

Obsidian Glaives

Chapter destroyed by the Red Waagh. Detailed in Sanctus Reach campaign.

Shadow Wolves

Fought along with the Black Templars defending their homeworld against a hive fleet. Notable for dying to a man with the last to fall being a battle brother keeping the chapter banner aloft; hardcore.

Soul Drinkers

Declared extinct. After becoming disillusioned with the Imperium and turning renegade, they were finally brought to trial and ended up sacrificing themselves to fend off a daemon army, the three loyalist survivors exhiled themselves to the warp along with their Chaos turned brother.

Tiger Claws

Lost in the warp, surviving members absorbed by their founders, the Astral Claws, who later caused the Badab War and turned traitor as the Red Corsairs after escaping following the defeat.

Unnumbered Sons

The initial reserve of Primaris Marines before they were entirely reorganised into existing chapters or formed new or legacy chapters.

Wolf Brothers

Succumbed to the instabilities of their gene-seeds. Any survivors are now feral wulfen.