Extinct chapters
This page is dedicated in remembrance of all those chapters that are entirely and definitely very dead. This does not include chapters that fell to chaos, so all those lost during the abyssal crusade aren't listed here.
Astral Knights
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.
Emperor's Swords
Destroyed by the Alpha Legion who contaminated their recruiting pool and implanting subconscious triggers in their recruits.
Emperor's Swords again
Based on Bellicas, which turned out to be a tomb world. Begin face-palming.
Knights of Eternity
Shadow Wolves
Nommed by nids. Black Templars found the last surviving member holding their chapter banner aloft even as he died; hardcore.