Changes

|Strength3 =[[File:Darkangelsymbol.png|20px]] [[Dark Angels]]<br>[[File:Ultramarinessymbol.png|20px]] [[Ultramarines]] ([[6th Company (Ultramarines)|6th Company]])<br>[[File:IronHandssymbol.png|20px]] [[Iron Hands]] ([[Clan Haarmek]])<br>[[File:Howling Griffons Symbol.png|20px]] [[Howling Griffons]]<br>[[File:Crux Terminatus.png|20px]] [[Red Consuls]]<br>[[File:Marines Malevolent badge.jpg|20px]] [[Marines Malevolent]]<br>[[File:Crux Terminatus.png|20px]] [[Shadow Haunters]]<br>[[File:Guardians of the Covenant symbol.png|20px]] [[Guardians of the Covenant]]<br>[[File:Crux Terminatus.png|20px]] [[Doom Griffons]]<br>[[File:Crux Terminatus.png|20px]] Six other [[Chapter]]s<br>[[File:Mortan Icon.png|20px]] [[House Mortan]]<br>[[File:Titan Icon.png|20px]] [[Legio Dominatus]]<br>[[File:Astra Militarum Symbol.png|20px]] 2 [[Imperial Guard]] Army Groups<br>[[File:FleetSymbol.jpg|20px]] 2 [[Imperial Navy]] sub-[[Battlefleet]]s{{Fn|1a}}

|Casualties1 = Extremely heavy<br>most of the civilian population of the [[Fenris System]] lost{{Fn|4c}}<br>Heavy [[Grey Knight]] losses including Grand Master [[Valdar Aurikon]]{{Fn|4c}}

|Casualties3 =

}}