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The '''{{PAGENAME}}''' was a major [[Chaos Space Marine]] raid in [[M41]]. It targeted [[Vilamus]], the [[fortress-monastery]] of the [[Marines Errant]] [[Space Marine]] [[Chapter]].{{Fn|1}}

In the last few years of [[M41]], [[Huron Blackheart]] of the [[Red Corsairs]] set out to steal large amounts of [[gene-seed]]. For unknown reasons, '''Vilamus''' became the target of Blackheart's next assault. The monastery itself was protected by its garrison, naturally, power shields to prevent [[teleportation]] inside the facility, and [[Las Weaponry|anti-air lasers]] to destroy invading vessels from orbit. Blackheart set in motion a plan to neutralize these defenses.{{Fn|1}}

With Vilamus' automated defenses deprived of power, and the small Marine garrison fighting off the enemy Terminators, Blackheart himself struck the coup-de-grace. He led an attack on the main chapel, which held many of the Chapter's most prized artifacts. The Marines Errant were torn between defended the gene-seed, which was essential to their survival, or the relics. Thus, they were divided, and subsequently slaughtered. Blackheart escaped with nearly all the Chapter's gene-seed, dooming the Marines Errant to a slow demise.{{Fn|1}}

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*{{Endn|1}}: [[Warhammer 40,000 5th Edition Rulebook]], p.146