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|quote = '''''"Logan Grimnar, Bloody-Handed Warrior. He piles the skulls of his enemies. He builds a mound of the fallen. His foes weep rivers of blood. Logan Grimnar, strong wolf of the pack. His Sword hungers for red flesh. His guns thirst for battle. He laughs. amidst the war-din. Logan Grimnar, father of wolves. His sons haunt his enemies. Slay them where they falter. And bring their pelts to Fenris."'''''{{Fn|2a}}

|}}

'''Logan Grimnar''', '''The Old Wolf, Fangfather''', and '''High King of Fenris''', has been the [[Great Wolf]] of the [[Space Wolves]] [[chapter]] for over 500 years and is one of the oldest [[Chapter Master]]s in the [[Imperium]]. Logan, like his fellow Space Wolves, is a fearsome warrior with great martial pride.{{cite this}} He has led his [[Great Company]] ('''Night Runner'''){{Fn|6}} against many enemies of the [[Imperium]] and has shown a renowned thirst for battle, which some say, even rivals that of their legendary [[Primarch]], [[Leman Russ (Primarch)|Leman Russ]]. He doesn’t tolerate any outside interference when running the Chapter, to the point where the Space Wolves have had numerous clashes with the [[Administratum]] and the [[Ecclesiarchy]] and this has lead to the accusations of [[heresy]] and treason.{{cite this}}

===13th Black Crusade===

During [[Abaddon]]’s [[13th Black Crusade]], Logan was selected as supreme commander for the defending Imperial forces. Under his command many key victories were won. If it were not for his leadership, more of [[Cadia]] would have been in the hands of [[Chaos]]. At the [[13th Black Crusade_#The Battle for the Cadian Gate|Battle of Kasr Sonnen]], Logan and his [[Great Company]] and the Chapter Master of the [[Dark Angels]], [[Azrael]], defeated a force many times their size by putting aside their resentment of each other.{{cite this}}

**{{Endn|9c}}: Chapters 20-21

**{{Endn|9d}}: Chapters 23-25

===Uncited===