Editing Extinct chapters (section)

== Unnumbered Sons ==
{{main|Unnumbered Sons}}

The initial reserve of [[Primaris Marines]] who weren't part of the first wave of the [[Ultima Founding]] that Guilliman took with him on the [[Indomitus Crusade]] and used to reinforce existing Chapters, refound Chapters or found new Chapters in the intermittent portion of the Ultima Founding along the way, before they were entirely reorganized into existing chapters or formed new or legacy chapters. Not technically extinct, but no longer exists as a functioning unit and was officially disbanded when their final core of veterans after the Battle of Raukos (which ended [[Retcon|the first phase of]] the Indomitus Crusade) were used for the last wave of the Ultima Founding and to reinforce the few Chapters that hadn't yet received reinforcements.