Changes

Before After the [[Hadex Anomaly]] manifested in 656.[[M40]], the Magog system was under the control of the [[Imperium]]. Since then, it System was drawn into and exited from the anomaly Anomaly countless times, as the anomaly Anomaly expanded and receded.{{Fn|1a}}While in the Anomaly, its stars glowed with a sickly red light. This glow stopped when they left the Anomaly.{{Fn|1b}} The area was the subject of [[Warp]] instability.{{Fn|1a}}

At the start of Before the [[Achilus CrusadeHadex Anomaly]]'s manifested in 656.[[Acheros SalientM40]], [[Imperial]] forces suffered heavy losses, the worst of which Magog System was under the loss control of the [[Storm Wardens]]' [[BattlebargeImperium]] ''[[Warchilde]]'', which was left as a [[hulk]] drifting in orbit within the Magog System's storm zone.{Fn|1a}}{{Fn|2a1c}}

During At the start of the [[Achilus Crusade]], one of the two 's [[Word BearersAcheros Salient]] , [[HostImperial]]s in forces suffered heavy losses, the [[Jericho Reach]] worst of which was identified by the presence loss of their the [[Desolator BattleshipStorm Wardens]] ''[[Dark ChorusBattle Barge]]'' in the Magog System.{{Fn|1c}} [[Chaos Space MarineWarchilde]] vessels bearing the markings of the warband '', which was left as a [[The Pyrehulk]] were also seen drifting in orbit within the Magog and [[Vanity System|Vanity]] systems, along with [[Space Marine Company|Company]] sized deployments of Pyre forces. Their vessels may have been shared with their allies's storm zone.{{Fn|1d2a}}

During the [[Achilus Crusade]], the Magog System was extensively defended by [[Chaos]] forces. It was considered virtually impenetrable by Imperial forces without drawing Chaos forces away from the System, or substantially increasing the manpower and resources of the [[Acheros Salient]]. Very few of the Imperial craft sent to scout it returned, a result of both the area's Warp instability, and the dark fleets reported by those that returned.{{Fn|1a}} There were numerous reports of [[Chaos Space Marine]]s active in, or moving towards the Magog System.{{Fn|1a}} One of the two [[Word Bearers]] [[Host]]s in the [[Jericho Reach]] during the Crusade was identified by the presence of their [[Desolator Battleship]] ''[[Dark Chorus]]'' in the Magog System.{{Fn|1d}} [[Chaos Space Marine]] vessels bearing the markings of the warband [[The Pyre]] were also seen in the Magog and [[Vanity System|Vanity]] Systems, along with [[Space Marine Company|Company]] sized deployments of Pyre forces. Their vessels may have been shared with their allies.{{Fn|1e}} A group from the [[Knights of Blood (Chapter)|Knights of Blood]] operated on the outskirts of the Magog System during the Achilus Crusade. [[Imperial]] forces incorrectly reported them as a [[Traitor Legion]] force, and a [[Deathwatch]] [[killKill-teamTeam]] was despatched to intercept. They arrived at the Magog System, and identified the group as being the Knights of Blood, but before they could decide how to respond, a nearby Imperial outpost was attacked by Chaos forces, and the Knights of Blood went to aid the Imperial forces.{{Fn|3}}

* [[Magog (Planet)|Magog]], once an Imperial [[Agri-worldWorld]], obliterated itself and became a [[Chaos]] [[Fortress World]], possibly orbited by a [[Blackstone Fortress]]{{Fn|1a}}{{Fn|2b}}{{Fn|4}}

**{{Endn|1b}}: ''Chapter IV: The Acheros Salient'', The Charon Stars, pg. 75**{{Endn|1c}}: ''Chapter IV: The Acheros Salient'', The Charon Stars, pg. 81**{{Endn|1c1d}}: ''Chapter IV: The Acheros Salient'', The Charon Stars, pg. 79**{{Endn|1d1e}}: ''Chapter IV: The Acheros Salient'', The Charon Stars, pg. 78