Changes

Founded in a [[M35]] Marines Mordant fought with a numerous enemies of [[Imperium]] including the [[Ork Empire of Octarius]]. In the [[M41]] they were undergoing a hundred year penance [[Crusade]] through the [[Tempest Hippocrene]].{{Fn|1}} In the last years of [[M41]] they fought with the [[Leviathan]] [[Hive Fleet]] where their [[Battle Barge]] ''[[Assiduous]]'' took a serious battle damages and Marines Mordant had lost two [[Space Marine Company|companies]] of battle-brothers.{{Fn|2a}}

In Later their homeworld of [[Vitrea Mundi]] fell victim to a force of [[Alpha Legion]] warbands under the command of [[M41Harrowmaster]] they were undergoing [[Quetzel Carthach]]. Vitrea Mundi [[PDF]] revealed their treachery, unleashing a hundred year penance chemical attack that confused mass panic and bloated out the planets sun. The Chapter Master [[Tarro Pallidax]] agreed to open the gates to his [[Fortress-Monastery]] [[CrusadeBas-Silica]] through to help the panicking refugees, but this was a ruse by Alpha Legion forces who stormed the citadel. However the Marines inside lowered the [[Tempest HippocreneVoid Shield]]s of the Fortress, allowing the orbiting Battle Barge ''Assiduous'' to unleash a orbital bombardment that annihilated both sides.{{Fn|12c}}