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'''{{PAGENAME}}''' is a [[Knight House]] of the [[Imperium]].{{Fn|1}}
==History==
In [[M42]], House Derthos took part in the [[Indomitus Crusade]] as part [[Battle Group Irasmus (Fleet Primus)|Battle Group Irasmus]]. Alongside the rest of the Battle Group, House Derthos took part in defending the [[Pankallis Sub-sector]], from [[Orks]] and [[Tyranids]] during the [[Octarius War]]. During the fighting, Lances of Knights from Derthos and [[House Mundast]] moved to reinforce the battered defenders of the Cogwall, rescuing surrounded forces and enabling a fighting retreat as the Ork's numbers were too great to oppose them.{{Fn|2}}
==Known Knights==
