Adamantine Knights

"The only thing better at killing Xenos, Traitors, and Heretics than an Astartes is that same Astartes in a tank"

- Grandmaster Seraphiel The Adamantine Knights are a Loyalist Chapter of the Adeptus Astartes descended from the honoured Dark Angels and their Primarch Lion El'Johnson through the Angels of Absolution. They were founded during the 23rd, "Sentinel", Founding to replace a chapter of the Astartes Praeses that had been destroyed by Chaos Forces. They made their home on the feudal world of Lazaron, a planet culturally and geographically identical to the Dark Angels long lost home of Caliban.

Early Years
When they were founded the Adamantine Knights received all the necessary equipment and genseed along with a cadre of veteran officers from their primogenitors to guide the nascent chapter through its infancy. For a time they remained too small to patrol beyond their home system for Chaos Raiders but as they grew in number so too did they grow more aggressive in their deployments.

Their crucible of battle would be during the 10th Black Crusade, fighting alongside the Guardsmen and PDF of Thracian Primaris against the Abaddon the Despoiler's Black Legion. Here the chapter's 4th company set the precedent that remains to this day, instead of a static defense they sallied forth from the walls of Hive Vyohr in an armored speartip that cut a deep wound into the Traitor forces, breaking the siege for a time at the cost of their own lives. When asked why they had sacrificed a full one hundred Battle Brothers to save a single Hive city the Grandmaster at the time, Amriel, answered, "We gave our word to the people of Vyohr to fight, and we kept it."

Time of Ending
The Adamantine Knights answered the call of Supreme Grandmaster Azrael of the Dark Angels and dispatched elements of their 1st, 2nd, 3rd, 4th, and 8th Companies to join the crusade to the Fenris system. This contingent fought beside Logan Grimnar's and Egil Ironwolf's Great Companies on Midgardia against the foul Plague Marines of Nurgle, however unbeknownst to their Space Wolf allies they had an ulterior motive for deploying to Midgardia specifically. One of the Champions of the Plague God leading the enemy was a member of the Fallen, Adonael, who was subjected to an overwhelming armored assault lead by Grandmaster Seraphiel and the Steelwing, the Adamantine Knights' elite 1st Company.

But while the bulk of the chapter was elsewhere a storm brewed near Lazaron, the forces of the Ruinous Powers grew in boldness, with incursions increasing in size and frequency. This was the prelude to what would become the 13th Black Crusade, and when it came the Adamantine Knights would be woefully unprepared due to the bulk of their chapter being deployed across Segmentum Obscurus. So it was that they were unable to send aid to the Cadian Gate when it fell under attack by Abaddon and the Black Legion, for Lazaron itself was besieged by the Daemonic Legions of Khorne. The 7th and 10th Companies manned the walls of Mount Leonis, which opened its gates to any of the world's mortal inhabitants who would join the Battle Brothers in fighting the Chaos forces. In command was High Interrogator-Chaplain Hadriel, who organized the Chapter's forces and their allies into a simple but effective defense. The mortals fired into the crimson tide of daemons while the Knights formed a mobile reserve, shoring up weak points in the line in overwhelming counterattacks. Their relief was the return of the Grandmaster's host, descending from the heavens in drop pods to annihilate the Khornate army. At the sight of reinforcements Mount Leonis's beleaguered defenders sallied forth from the gates charging into the heart of the daemonic horde.

Age of the Dark Imperium
In the Imperium's darkest hour the Avenging Son was awoken from his stasis to lead a new campaign against the Dark Gods' servants, the Indomitus Crusade. Having suffered catastrophic losses on Midgardia and Lazaron the Adamantine Knights welcomed the Primaris Marines with far less suspicion than their Unforgiven brethren.

Chapter Colours
The Adamantine Knights paint their armor in white, black, and silver.

Chapter Badge
The icon of the Adamantine Knights is a pair of white crossed swords facing downwards