Logan Grimnar - First War for Armageddon: Favoured by the Chapter and with the shadow of greatness upon him, it was only a matter of time before Logan Grimnar ascended to the rank of Great Wolf. Few Space Wolf battle-brothers had ever seen a warrior as skilled or a general so gifted as Grimnar, and all who stood in his presence could not help but be swayed by his rich booming voice.As the priest had foreseen, Grimnar was like a hero of old, elevating the Chapter to new heights of greatness. Logan Grimnar's first great test as Chapter Master was to be upon the war-torn world of Armageddon in a conflict known as the First War for Armageddon. An industrial hub for over a hundred star systems in the Segmentum Solar, the Hive World was a lynchpin munitions planet for the Imperium. The invading forces of Chaos were comprised of millions of Chaos Cultists known as the Children of Sanguinary Unholiness, as well as the Khornate army of Chaos Space Marines from the brutal World Eaters Traitor Legion who were led by the Daemon Primarch Angron and his elite guard of 12 Khornate Daemons, the Cruor Praetoria.Angron struck Armageddon in 444.M41, leaving a trail of blood and death in his wake as he stormed out of the Eye of Terror. In the first terrible days of the invasion Angron and his Chaos hosts ravaged the world's hive cities. The Astra Militarum's Armageddon Steel Legion fought valiantly and with great determination but they were as mortals before vengeful demi-gods, and the fields of battle were soon littered with their broken and bloody corpses. The World Eaters would have turned the entire planet into an abattoir dedicated to their dark god had it not been for the intervention of the Space Wolves. Answering the call of the imperilled world, Logan Grimnar led the entire Chapter to Armageddon.The Inquisition, along with a force of Space Marines of the mysterious Grey Knights Chapter, also became involved when the nature of the enemy was revealed. Grimnar, who as a Chapter Master was aware of the Grey Knights' otherwise secret existence, asked for the Chapter's help against this daemonic horde.A hastily mustered ad hoc brotherhood (company) of Grey Knights, along with other Inquisition forces and as many as 30 Inquisitors, made swift passage to Armageddon in order to join the ultimately victorious fight. The Inquisition task force was under the overall command of Inquisitor Lord Ghesmei Kysnaros, an Inquisitor of mysterious origins who was unaligned with any of the existing Inquisition Ordos.On the banks of the mile-wide River Chaeron, the Space Wolves and the Armageddon Steel Legion made their stand. Grimnar proved his leadership time and again, turning back the Chaos host and holding together the armies of the Imperium by force of will. When the World Eaters and their daemonic allies broke upon the banks of the Chaeron, Angron turned east and personally led an assault toward the Helsreach and Infernus hives, twelve Bloodthirsters formed a bodyguard around the Daemon Primarch.Here Grimnar showed not just his fearlessness in battle, but also his wisdom. Whereas many other Wolf Lords would have struck Angron head on, hungry for personal glory and the thrill of battle, Grimnar knew that courage and steel would not be enough. Just before the Space Wolves attacked, the Great Wolf let out a piercing howl. Responding to his pre-planned signal an entire brotherhood of Grey Knight Terminators teleported into the midst of Angron and his Bloodthirsters, the psychic Astartes warriors turning the tide in the Imperium's favour.In addition to defeating the threat posed by the forces of Chaos on Armageddon, the Inquisition was there to guarantee that sensitive information regarding the existence and nature of the Archenemy, and the existence of the secret Imperial assets arraigned against it -- the Grey Knights in particular -- would not spread beyond the planet into the wider galaxy, where it could increase the chance of Chaos corruption amongst the teeming masses of Mankind.The suppression of these truths is a basic element of the Inquisition's mandate concerning the Imperium's eternal fight against Chaos, and often involves brutal and indiscriminate purges, where Imperial citizens are liable to be executed on mere suspicion, and whole worlds subjected to the horror of the Exterminatus.