Community-header-background This article, Steel Hart, was written by Classic0105. Please do not edit or 'acquire' this fiction without the writer's permission.

Tech-Priest Construction.png This article, Steel Hart, is currently under active construction. The author, Classic0105, apologizes for the inconvenience.

The Steel Hart are a strictly Codex-compliant Astartes Chapter, officially of Ultramarines descent. In reality, they are descended from Iron Warrior gene-stock. Originating from the 3rd Founding, the Steel Hart are deeply loyal to the God-Emperor of Mankind and the eradication of His enemies, and have amassed an exemplary record in this regard. However, the Steel Hart have at times shown a disturbing and callous disregard for their own lives as long as their mission objectives are achieved. This cavalier attitude has often carried over to their auxiliaries or allies, each burdening heavy casualties alongside the Astartes Chapter.

The Steel Hart, much like their parent Chapter, are equipped well and possess a fair number of relics, though they rarely carry them into battle. The Steel Hart have been involved in numerous successful campaigns, and were often instrumental in the destruction of the enemies of the Imperium. Tales of their dedication and fortitude are well known through the Imperium, often they refuse to take even a step back in their search for Redemption. During the Indomitus Crusade the Steel Hart welcomed their Primaris recruits with open arms, seeing in them a new beginning for their Chapter untainted by their past sins.


Venerable Contemptor Dreadnought Sohcrah Tyr

In the aftermath of the Horus Heresy, the Ultramarines Legion was inundated with the Loyalist remnants of the Traitor Legions. One of those remnants was Line Company Cervus, formerly of the Iron Warriors, lead by Captain Tarrasch Vast. Escaping from the Istvaan V Dropsite Massacre, with other survivors from the Loyalist Legions, Vast and his brothers would spend the Heresy wracked with guilt, convinced they were equally guilty for the horrors that occurred that day. The few survivors would continue to serve the Imperium as Ultramarines until the 3rd Founding in 021.M32, when Vast and his brothers were chosen to lead a new Chapter, named the Steel Hart, intended to defend the Eastern Fringe of the Ultima Segmentum, they were based upon the Feudal World of Croi.

Though their true lineage has been redacted from most Imperial records, there are always those to whom no information can be withheld. Made from the gene-seed of the brutal and unforgiving Iron Warriors Legion, the Steel Hart are viewed with contempt by those who know the truth. Being offsprings of a Traitor Legion of the ancient Legiones Astartes, the Steel Hart are considered to be beneath other Astartes, a belief only accentuated by a disregard for their own lives, leaving them despised and mistrusted by most Chapters they came into contact with. This was, however, more in line with the Chapter's own beliefs than against them. The Steel Hart has always been mired with regret and despair, loathing themselves for their actions during the Heresy, and the deaths they caused at the Dropsite Massacre, they have chosen to bear this burden, viewing it as a suitable punishment for their actions.

Notable Campaigns

  • The Drop Site Massacre (006.M31) - Line Company Cervus, lead by Captain Vast, escapes the slaughter of Istvaan V with the survivors they could gather. Captain Vykar Teav of the Raven Guard VIIth Company, along with the survivors of his Company and 3rd Squad of Cervus, was separated from the main party and assumed dead, until Legionary Sohcrah Tyr, the only survivor of 3rd Squad, was seen leading the remnants of the party to the extraction zone.
  • Betrayal at Calth (007.M31) - Escaping to Ultramar from the Drop Site Massacre, the Loyalist remnants arrived as the battle reached its zenith. Their contribution to the battle culminated in the deaths of Word Bearer Chaplain Isadbul at the hands of Legionary Sohcrah Tyr while Captain Vykar Teav dualed and killed Dark Apostle Mosthur. After the battle the survivors of the Loyalist Legions were reunited with their brothers, while Line Company Cervus was kept in Ultramar to aid in the defences of the future Imperium Secundus.
  • The Iron Cage (014.M31) - The Iron Cage is the name given to the greatest battle fought between the Imperial Fists Legion of Space Marines and their ancient rivals, the Chaos Space Marines of the Iron Warriors Traitor Legion, on the world of Sebastus IV in the early 31st Millennium. After three weeks and six days, the Ultramarines, Corvus now being a squad in the Veteran Company, finally intervened despite the Imperial Fists' protests, driving the Iron Warriors off the world with a combined orbital and ground assault.
  • Purging of Croi (001.M32) - During a patrol of the Eastern fringes of Segmentum Ultima, the Steel Hart discovered the ragged armies of Croi punching a hole through the center of an Ork horde. Easily dispatching the Greenskin menace, the Astartes at war struck the humans dumb. Eager to join the Imperium after such a display, the Steel Hart instated themselves as the guardians of Croi and it's system, defending the Imperium's Easternmost domain from Xenos and Chaos invasions.



Departmento Cartographicae pict-file of Croi, Adeptus Astartes Homeworld of the Steel Hart Chapter.

Croi is a Feudal World, also classified by the Administratum as a Civilised World, located in the Aónor system in the Eastern Fringe of Ultima Segmentum. Croi is an extremely cold, forest covered planet where the temperature rarely rises above freezing. The harsh Ice World of Croi was originally a fertile World, though it's cold climate mede crops almost impossible to grow resulting in reliance on livestock. Many romanticised records survive of its colonisation by humanity, legends depicting a world ripe for conquest. Unfortunately, Croi was destined for catastrophe. Approximately twelve thousand standard years ago, just before the end of the Age of Strife, a damaged Ork warfleet descended on the world and proceeded to fight the Croi for every gram of the precious food they had stored. The Croi held out bravely for millennia in their vast hive cities beneath the canopies but were ultimately pushed back to the food vats. Eventually they destroyed the Orks by using ice boring machines to strategically strike at the heart of the mob, burning and melting most of the Orks and scattering the rest.

Even this Greenskin invasion proved unable to blunt the Croi's indomitable spirit. Their grim refusal to surrender, despite overwhelming opposition, had won them a historic, if bloody victory. After destroying the Ork invaders on their own world, Croi forces, in an act of vengeance, joined with the Steel Hart Chapter to cleanse their sector of the hated Greenskin menace.

After witnessing the danger an unguarded eastern front, the Steel Hart offered themselves to the Planetary Government, who gladly accepted. Even with their new protectors, the Croi continued to display the same stoic determination that they had shown in defence of the Hive Cities of their own homeworld. To this day, the courage and tenacity of the Croi in battle continue to earn them the respect and admiration of other Imperial Worlds from all over the galaxy.

Croi soldiers are expected to carry each and every item they will need to survive. Even with their thermal jumpsuits, they would not be expected to survive more than a week deep in the arctic forests of Croi while logging without them. The armoured battle tanks and artillery units of the planet are uniformly camouflaged in a manner suited to the frozen taiga of their world, and each vehicle proudly displays the name of their homeworld on its hull.

It is common for regiments of Croi to be assigned by the Imperial Guard to Arctic Worlds, due to their natural resilience to the cold. The Steel Hart are heavily involved with their people, the Planetary Governor consulting the Chapter Master on all matters of state, and Battle Brothers standing guard against the mega-fauna that prowl the planet.


The Heartforge is armoured and void-shielded to withstand any siege or bombardment that might befall it. Armed to repel attackers from land, air or space, its walls bristle with enough heavy ordnance to flatten a hive city. Every aerial approach to the fortress-monastery is overlooked by Icarus Pattern Lascannons, and a Macro-laser stands like a spear of vengeance to lance space-borne enemies from the heavens. The fortress-monastery's Librarius is a lightning-wracked spire where the Chapter's Librarians study their lore and chronicle the deeds of the Steel Hart. They also preside over the Chapter's Astropaths as they relay psychic messages throughout the void, communing with the greater Imperium and those Steel Hart across the galaxy.

The Heartforge is located in the Ais Croi mountain range, usually referred to as the Ais, the largest mountain range on the planet. The mighty Fortress Monastery is situated in the Valley of Fiáin alongside the Fionn's Fall. The Steel Hart's citadel is considered a wonder of engineering, containing graceful balconies, golden geodesic domes and slender glass walkways supported by silver-steel buttresses. The vast domed structures of the fortress are citadels in their own right. It contains such locations as Thetra, a rocky promontory overlooking a waterfall, accessible from the Fortress-Monastery. According to Croi legend, the Rock was where Cormac O'Airt, former High King of Croi, beheaded the rebellious Queen Sadhbh who had began a violent civil war lasting for several bloody decades. The Steel Hart themselves use the Rock as a place of execution, for members of the Chapter who have been condemned for serious crimes.

The Library of Oisín is the Librarium of the Steel Hart Chapter, located within the Heartforge, occupying an entire spur of the range of the Ais Mountains. It is named for its founder Oisín, the first Librarian born of Croi stock and considered to be the greatest poet and scholar ever seen by the planet, if not the Imperium. This Librarium is considered one of the greatest repositories of knowledge within the entirety of the Ultima Segmentum, and it has a reputation bested only by the Ultramarines' Library of Ptolemy. The Court of Attendance was one of the original landmarks that the Heartforge was built around, a wide courtyard set in the base of the Ais Mountains. The walls had advanced from the courtyard, leaving it some way from the edge where before it had stood at the brink of man-made cliffs.

The side nearest the Hive City of Tír, the capital of Croi, bears a monumental gateway, through which pilgrims from across the Sub-Sector come to offer praise for the Emperor and his Astartes. But the courtyard remains an important place where Croi's dignitaries and a contingent of an Astartes Honour Guard could greet an important guest with all the pomp and circumstance that they could muster.

The Spear Hall is a vast, expansive chamber that contains the precious Chapter relics that harken back to the earliest days of the Steel Hart. Suspended within a golden shaft of light, in the centre of the chamber, trapped in an anti-gravitic suspension field above the marble floor, is the legendary Fiacha, a spear crafted by the Master of Sanctity Fionn O'Cumhaill to combat the Splinter Fleet Fomoria.

The Laoch Crypts are where the dead hero's of the Chapter are interred by the Master of Sanctity. Located beneath the Spear Hall, it is the main site of pilgrimage for the worshippers who make the trek to the Heartforge, as one of it's deepest chambers hold those Astartes the Chapter believe to be free of sin, including Chapter Master Tarrasch Vast and Master of Sanctity Fionn O Chumhaill.


The Steel Hart bear the gene-seed of the Iron Warriors. Like the gene-seed of their parent Legion it is extremely resilient to mutations and is known to create Space Marines who are extremely intelligent and possessive of naturally well-developed problem-solving abilities. However, the acute paranoid of the Iron Warriors often shows through, with the worst instances requiring the Lord Executioner's hand to rectify.


"Be calm, little Brother, all is well. The brandings are not a punishment, quite the contrary. They are our sins, not hidden away to fester in the darkness, but cast into the light of the Emperor for His judgment. It is through Him that we find absolution, and so we must not hide our wrongs from Him. Here, bite down on this son. It helps, I know..."
— Chaplain Micheal Éibhear, upon the initiation of Padraig Donagh to the 10th Company

The Chapter utilises a variety of trials to select Neophytes, each designed to test an aspirants skills in the snowy taiga of Croi as closely as possible to that laid out by the Codex. As the Steel Hart have long been the rulers of Croi, its nobility considers having a son chosen to join the Chapter to be an honour without parallel. Adolescent Aspirants who wish to join the Steel Hart are generally expected to overcome two different types of Trials if they hope to be chosen to become Neophytes.

First, the Astartes expect their Aspirants to pass what is known as an Exposure Trial within one of the icy taiga that covers most of Croi. The untamed regions of the world feature environments that are inimical to life, such environments ranging from sub-zero ice wastes, Vast forests inhabited by almost primeval predators and prey both capable of easily ending a human life, to vast ice capped oceans. In an Exposure Trial, the Aspirant must go out into such an environment and simply survive for a set period of time. As a native of such a hellish place, the Aspirant will have some knowledge of how to survive, yet is shorn of all aid and divested of all but the most basic of survival equipment. The Exposure Trial tests the Aspirant's fortitude, the Aspirant travelling from one point to another, with countless hundreds of kilometres of trackless snow-blasted plains separating the two.

The second Trial for Aspirants is the Challenge Trial. The Challenge requires the Aspirant to fight a duel or compete in some other manner against a full Astartes. In truth, none expect the Aspirant to better a full Battle-Brother and his success is more often measured in the degree of his failure. Very occasionally, an Aspirant does manage to beat an Astartes and when this happens it is not uncommon for the individual to go on to become a legendary hero of the Chapter.

Many Challenge Trials involve a test of martial skill, with the Aspirant fighting an armed duel against a Battle-Brother. It is usual for the Aspirant to be armed and the Astartes to fight with his bare hands and probably without his Power Armour, yet still the Aspirant has virtually no hope of victory. Most Challenge Duels end in the death of the Aspirant, for even an unarmed, unarmoured Astartes is a giant compared to the young, adolescent challenger and well able to slay him with a single blow, intentionally or not. Other Challenge Trials involve contests of strength, stamina, speed, skill or mental strength.

The Trial might otherwise range from the lifting of impossibly heavy loads to the imbibing of toxic substances. As with a duel, this type of Challenge Trial can often prove deadly. In both cases, however, an Aspirant that has failed the Trial -- yet performed to the Chapter's satisfaction -- is rescued from the jaws of death by the Chapter's Apothecaries and judged worthy of progressing to the rank of Neophyte.

Ironically, after surviving in such inhospitable climates and partaking in such impossible tasks, one of the first things that a Neophyte will be told of is the burdens he must now bear. Every Battle-Brother stands guilty in the eyes of the Emperor and the only absolution possible is that forged by sacrifice and blood in service to the Imperium of Mankind and one's fellow Astartes.

Chapter Beliefs

"Horus did not first come as a warlord bestriding the Galaxy, but as a whisper in the heart of the Loyal."
— Master of Sanctity Kain Redmond, at the initiation of a Brother Astartes

While being the inheritors of Perturabo's superb military genius and ferocity in battle, the Steel Hart have always chosen to fight in the manner prescribed by the holy pages of the Codex Astartes for ten millennia. They do not interpret the sacred words of the Primarch loosely, for to do so is considered a sin in their eyes. Such deviation is unthinkable to the Steel Hart. To the Chapter, the Codex is a divine work of wisdom, sanctified by the beneficent Emperor Himself. The Steel Hart see no reason to deviate from its wisdom. The life-long lessons of discipline and self-reliance are taught to the people of Croi from birth, giving them the strength of character to hold true to teachings over ten thousand years old. They hope that their loyalty now will one day earn them absolution for the past.

In order to achieve this, they believe that they must wear their sins in the open. Whenever a Marine confesses their sins, the Company Chaplain will brand their skin with hot irons, their failings clear for all to see until they have been absolved by the Master of Sanctity himself, whereupon the Apothecarion will work to remove the scarring. The number and severity of these brandings are used within the Chapter as an informal hierarchy, affecting their deployment and rank advances. Every Astartes, upon initiation as a full Battle-Brother, has their back branded with the words "Traitor" and "Murderer", as the Steel Hart believe their actions at Istvaan V are a sin they must bear until the Emperor Himself absolves them.

In the Primaris Marines, they see this absolution. That the Emperor would give them these new Brothers indicates that they have been forgiven foe their crimes, and that they can begin the process of recrafting their Chapter. As of the Indomitus Crusade, the Steel Hart have no branded their Aspirants with the sins of treachery and murder, believing that these new Primaris Marines prove that they are slowly achieving atonement for their heinous crimes.

Chapter Organisation

Chapter Command

Steel Hart Icon 2.png
Kyr Ingoldt, Lord of Croi,
Chapter Master of the Steel Hart
Michael Padraig, Chapter Champion
Thomas Ahearn, Primaris Ancient
Dermot Enda, Apothecary
Connor Dara, Lieutenant
Eoin Ronan, Weapons Specialist
Venerable Sohcrah Tyr, Contemptor Dreadnought
7 Honour Guard
1 Land Raider (Fianna)
Chapter Equerries
1,700 Chapter Serfs & Servitors
Armoury Reclusium Apothecarion Librarius Master of the Fleet
Armoury Icons.png
Seamus Rourke
Master of the Forge
24 Techmarines
103 Tech-Servitors
48 Battle Tanks (multiple types)
25 Predators
8 Vindicators
9 Whirlwinds
12 Land Raiders
14 Gunships (Stormtalons & Stormravens)
24 Centurion Warsuits
19 Land Speeders
Assault Bikes
Attack Bikes
Reclusium Icon.png
Kain Redmond
Master of Sanctity
Aodh Fiacha
10 Company Chaplains
Prime Helix I.png
Finbar Raghnall
Chief Apothecary
13 Apothecaries
Librarius Icon.png
Egan Cleary
Primaris Chief Librarian
6 Epistolaries
7 Codiciers
11 Lexicaniums
5 Acolytes (Neophytes)
Fiachra Brendan
Master of the Fleet
6 Battle Barges
13 Strike Cruisers
22 Escorts
84 Thunderhawks
Veteran Company Battle Companies
1st Company 2nd Company 3rd Company 4th Company 5th Company
"Laochra Croi"
Veteran Captain Gannon Kathel
Veteran Primaris Lieutenant Colin Wilde
97 Veterans (including Terminators)
3 Dreadnoughts

"Caomhnóirí an Croi"
Primaris Captain Kasey Mahon
Master of the Watch
Lieutenant Nevan Senan
4 Tactical Squads
2 Assault Squads
1 Devastator Squads
4 Intercessor Squads
2 Inceptor Squads
3 Hellblaster Squads
2 Dreadnoughts
"Bán Anaithnid"
Captain Tomas Ultan
Master of the Arsenal
Primaris Lieutenant Neal Lawler
6 Tactical Squads
2 Assault Squads
2 Devastator Squad]]s
3 Intercessor Squads
1 Inceptor Squad
1 Hellblaster Squad
2 Dreadnoughts

"Cosantóirí an Chirt"
Primaris Captain Galvin Eamnonn
Primaris Lieutenant Liam Kynan
2 Tactical Squads
1 Assault Squads
1 Devastator Squads
5 Intercessor Squad
2 Inceptor Squad
2 Hellblaster Squad
4 Dreadnoughts

"Maoirseacha Cruach"
Captain Gair Kerwin
Lieutenant Flynn Driscoll
Master of the Marches
6 Tactical Squads
2 Assault Squads
2 Devastator Squads
1 Intercessor Squad
1 Inceptor Squad
1 Hellblaster Squad
1 Dreadnought
Reserve Companies Scout Company
6th Company 7th Company 8th Company 9th Company 10th Company

Captain Alleyne Cathan
Lieutenant Conlan Cathmor
Master of the Rites
10 Tactical Squads
2 Dreadnoughts

Captain Cormac Grady
Lieutenant Duan Conway
Chief Victualler (Quartermaster)
10 Tactical Squads
1 Dreadnought

Captain Keefe Loman
Lord Executioner
Lieutenant Oran Conway
10 Assault Squads

Captain Tomas Reilly
Master of Relics
Lieutenant Dermot Shanahan
10 Devastator Squads

Captain Tormey Shea
Master of Recruits
Lieutenant Sloan Rian
Reiver Squads
Scout Squads

Specialist Formations

Steel Hart Honour Guard

The Honour Guard of the Steel Hart Chapter is comprised of those warriors who guard the revered Chapter Banner. To become an Honour Guard, one must display courage that goes above and beyond the normal call in a given combat situation. The Steel Hart Honour Guards wear highly ornate suits of Artificer Armour and are each armed with a Croian Pike, a powerful weapon forged by the Techmarines in the Chapter's Forge and constructed with rare ores excavated beneath the mountains of Buaic. Among those in the Honour Guard are two special individuals, the Chapter's Ancient, who is the bearer of the sacred Banner of the Hart and the Chapter Champion, the mightiest member of the Honour Guard who is armed with the Honour Blades, a matching set of master-crafted Power weapons -- a spear and a poniard -- which he wields with deadly skill.


Like their fellow Astartes Chapters, the Steel Hart maintain a Librarium of potent psykers who are highly talented and trained to master the power of the Warp at the highest levels. They know of the dangers the Warp presents, remembering how it turned their brothers to treachery. Therefore, they train their minds constantly to reinforce their willpower to control their powerful psychic abilities as stoically and unyielding as Adamantium. Though they stand apart from their fellow Battle-Brothers because of their innate abilities, the need for vigilance is never treated lightly, and the Librarians of the Steel Hart Chapter routinely engage the minds of its Space Marines in order to ensure their purity and fortitude. Like their fellow battle-brothers, they too, are driven by guilt for their actions during the Heresy, and so strive to ensure such weakness can never occur again.

They are meticulous in their record keeping, chronicling any discovered mental deviancy for future reference. Battle-Brothers who have been exposed to particular psychic strain and trauma, such as through contact with alien horrors or the warping influence of Chaos, must undergo a series of strict screening rituals conducted by the Librarians in order to confirm the integrity of their minds, while the Reclusium focuses on their spirit. Like all Space Marine Chapters, the Steel Hart believe that their gene-seed is the Chapter's life-blood, the most invaluable of possessions, and must be kept pure at all costs. Any trace of perversion or corruption within the gene-seed must be eradicated utterly of any weakness or deficiencies if the Chapter is to remain strong and survive. Steel Hart brethren are known to abhor any trace of weakness within themselves, even more so than other Astartes Chapters. They are extremely puritanical in their drive to identify and purge their flaws.

The Steel Hart Librarium houses the collective knowledge that the Chapter has acquired over the millennia. Scribes work ceaselessly within its walls, labouring to duplicate the older texts as they are gradually destroyed by time. The Librarians of the Chapter are charged with the upkeep of the Librarium, and it is their responsibility to maintain its integrity.

Combat Doctrine

The Steel Hart Chapter has come to rely on the holy dictates of the Codex Astartes to meet any given tactical situation. This tome contains the wisdom of the thousands of Imperial warriors who have contributed their expertise, and details everything from proper unit markings to how to launch full-scale planetary assaults within its pages. The Steel Hart does not specialise in any particular form of combat, instead proving to be the ultimate generalists, surprisingly proficient at every task required in warfare, but their heritage as Iron Warriors still shows in their exemplary siegecraft.

Notable Members

  • Chapter Master Tarrasch Vast - A former Captain in the Iron Warriors Legion, Tarrasch Vast was the one to lead Line Company Cervus across Istvaan V in the search of survivors. A latent psyker, he was mentored by Warsmith Kybolt Brask to subdue his powers, meaning they were not affected by the Edict of Nikea as much as others in the Legions were. Free from the overview of Legion Chaplains, his prophetic dream was allowed to bloom. He would find himself in a snow covered forest, following an ethereal hart out of the gloom and into a blinding light. He was at a loss as to what these dreams meant, and whispered discussions with Brask were unable to shed light on the matter. It was only in the third hour of the Drop Site Massacre that he saw it, the hart appeared to him, not in a dream this time, but weaving through the figures battling on the churned mud before him. He followed it, Cervus following diligently behind him, until he saw the blinding light on the horizon. The hart disappeared, and the light faded, until Vast could finally see what he was meant to see. The Loyalist Legions, the Raven Guard, the Iron Hands, the Salamanders, fighting desperately to reach Raven Guard Stormbirds, leaving their dead and wounded in the dirt. The full scale of the atrocities he committed laid before him, he joined the flight, saying the Traitor Legions and rescuing as many Loyalists as they could, before fleeing in the transport ships of the Raven Guard. He would go on to serve as the first Chapter Master of the Steel Hart until his death in 465.34M, where a Raptor Cult under the command of Krasko Hemlocke isolated them, and then descended. Vast was ripped apart by three Raptors as his Brothers fell around him. His remains and the remains of his squad were salvaged and returned to the Heartforge, where they were interred in the Laoch Crypts.
  • Chapter Master Kyr Ingoldt - The last Astartes of Olympian blood in the Chapter, Kyr Ingoldt was made Chapter Master after a long and notable service to the Imperium. He was first noticed by the leaders of the Chapter as he near immediately assumed the command of his fellow Aspirants, leading them through their trials with an almost unprecedented series of victories. However, his brazen arrogance was worrying, showing no restraint in his actions or even seeking a route around trails other than head on violence. His arrogance, as well as his Olympian heritage, made the Chapter intent to curb his advance. Contacting the Scouts monitoring their actions, the Sergeant was instructed to make contact with the Aspirants, offering to bring directly to the Fortress Monastery any among them who could defeat him in combat. As expected, Kyr accepted his challenge, what was not expected was his victory. After a lengthy match, Kyr bested the Scout and was brought to the Monastery, where Chief Librarian Connor Byrne was awaiting him. After apparently praising his actions during the trails, Byrne began recounting to Kyr the story of the Drop Site Massacre, berating him for his rashness and arrogance. After Kyr refused to accept his accusations, Byrne subjected him to visions of the event, showing him the actions taken by Cervus that day. Speechless and weak after the vision, Kyr had to be carried to the Apothecarion by a pair of Serfs. The remaining Aspirants arrived to met a radically changed Kyr than the one they left, somber and humble, he was to lead them as a Lieutenant to the 10th Company Captain, Callum Gallagher. He served the Chapter with distinction through many campaigns over the centuries, his strategic mind and natural leadership quickly advancing him through the ranks, and within four centuries earning him the mantle of Chapter Master of the Steel Hart.
  • Venerable Sohcrah Tyr - A Legionary serving diligently in Line Company Cervus, Tyr was by his Captains side when they betrayed their Legion and fled for Macragge. While they fled Istvaan V, they rescued as many Loyalists as they could, including Raven Guard Captain Vykar Teav. During the fighting, the Raven Guard Captain and Tyr's 3rd Squad were isolated by the Night Lord Raptor Krasko Hemlocke, who slew 3rd Squad and most of Teav's men, before Tyr, armed with a Thunder Hammer retrieved from the dead of the Massacre, caved in his body, sending him flying across the field and allowing the survivors to escape. After their escape, Teav gifted him the Umbra Talon, his master crafted Power Claw, as thanks for his aid, which he later used to slay the Word Bearers Chaplain Isadbul at Calth. At the Founding of the Steel Hart, Tyr would become the Chapter Champion, and fight with Vast until 465.34M, when Hemlocke returned to kill him. Having been saved from death by the efforts of Emperor's Children Apothecary Fabius Bile, Hemlocke had Hunted his old friend Tyr throughout the centuries, held back only by the need to repay his depth to Bile. Having accelerated his Betcher's Gland and connecting it to a dispenser in his chainsword, as well as heighten his senses and reflexes, Bile had made Hemlocke into a sublime murderer, easily capable of overpowering Tyr. It was only Hemlockes gloating that saved Tyr, for his Brothers reached him in time to force Hemlocke to flee, leaving Tyr slowly succumbing to the toxin flooding his system. To save him, he was interred within a Contemptor Dreadnought sarcophagus, where he resides to this day. The Umbra Talon was refitted by master artificers of the Chapter, allowing the Dreadnought to carry it into battle. He is interred with his fellow Dreadnoughts in the Laoch Crypts, only awoken when his Chapter is in dire need of him, for whenever he takes to the field of Battle, Hemlocke is sure to follow.

Deathwatch Service

"I hear them Brother, they are coming. Lean on me, I must get you out."
— Brother Abban Cormac of the Steel Hart to Brother Kolver Santo of the Iron Hands

The Steel Hart have been sending Battle-Brothers to the service of the Deathwatch for millennia, and Watch Fortress Erioch has several of the Chapter's brethren occupying senior appointments, including the Deredeo Dreadnought Abban Cormac. As one of the oldest Adeptus Astartes Chapters, the Steel Hart have fought against a myriad foes, and often bring huge reserves of experience and wisdom to the Deathwatch upon taking their Apocryphon Oath.

In addition, the Steel Hart are known for their resolute devotion to duty, undertaking the most arduous of missions with solemn dedication. It is this reason that they are always welcomed by their Astartes brothers in the Deathwatch, they can always be counted upon to defend their brothers to the death.

Chapter Appearance

Chapter Colours

The Steel Hart typically paint their Power Armour and vehicles a light grey, and their symbol is the silhouette of a stag's head. The Steel Hart also utilise red and white chevrons, usually on weapons such as Power Fists. They incorporate the double-headed Aquila into their personal and vehicle iconography, with a particular emphasis on the use of the symbol with officers and elite squads. A golden trim is usually present on any use of the Aquila in Ultramarines' iconography. The Steel Hart's shoulder plate armour trim colour varies depending on the company the Space Marine belongs to, with the 1st Company being trimmed in white, the 2nd Company trimmed in gold, etc., as the Codex Astartes dictates. The Apothecaries of the Steel Hart also make use of grey armour, but their hands, shoulder guards and backpacks are painted white. Librarians possess a white vertical stripe painted down the centre of the helm.

Chapter Badge

The Steel Hart's Chapter badge is a large, black silhouette of a stag's head, dedicated to Line Company Cervus and the psychic visions Tarrasch Vast received that lead to his abandoning of the Iron Warriors, centred on a field of grey.

Chapter Fleet

The Steel Hart can field up to 4 Battle Barges, as the the system of Aónor depends on the Chapter for sector naval protection rather than on a battlefleet of the Imperial Navy. The Master of the Fleet for the Steel Hart is Captain Fiachra Brendan, an Astartes and one of the heroes of Croi.

  • 4 Battle Barges
    • Currach
    • Dato Negotio Cervus
    • Ferro Sors
    • Ferro Domini
  • 12 Strike Cruisers, including
    • Mors Inanis
    • Accipiter
    • Ferro Domum
    • Nairena
    • Oceani Sedebat
    • Ferro Noctem
  • 17 Escorts
  • 75 Thunderhawk Dropships

Chapter Relics

  • Fiocha - The spear crafted by the Master of Sanctity Fionn O Chumhaill, considered by the Steel Hart to be one of the few of their number free from sin, which he carried into battle against the Splinter Fleet Fomoria. The sigils etched into the shaft, when blessed by the Chaplain, disrupted the Tyranids Synapse enough to reduce them to mindless beasts, which turned upon each other with fervor. Fionn was slain that day by a Fomorian Hive Tyrant, and no other Astartes has been able to wield the Fiacha since.
  • Cu-Chulainn - Crafted by the Salamanders for the then Captain of the 8th Company, Lugh Chulainn, as thanks for the 8th Company's aid in defeating the Djofret Dynasty in M33, and also to show the Salamanders had forgiven the Chapter's actions on Istvaan V, Cu-Chullain, the 'Hound of Chullain' in Low Gothic, is the name given to the suit of Artificer Armour and the serrated Power Axe wielded by the Lord Executioner of the Steel Hart Chapter.
  • Feidhmeannach - A rugged and aged power sword, outdating the Chapter itself, Feidhmeannach is used by the Lord Executioner to dispatch Brothers of the Steel Hart who have fallen to the paranoia that plagues their lineage. It is thick, flat edged, and resembles the swords used by the inhabitants of Croi as a means of executing nobles or prisoners of war. It has not been used on the field since the chapter received Cu-Chulainn from the Salamanders, instead being reserved for those Brothers too far lost to their paranoia to be saved.
  • The Iron Within - Those Pilgrims traversing the Heartforge will be confused to see a twisted hulk of metal given pride of place in the Spear Hall, but to the Steel Hart there is no confusion. The Iron Within is the remains of Warsmith Kybolt Brask, a latent Psyker and mentor to Tarrasch Vast. After his death at the hands of Perturabo, his remains were launched into the command deck of the Grithos, the ship in which Line Company Cervus and the Loyalist Legion survivors escaped Istvaan V, in the hopes of demoralising the Loyalist forces. However, it served only to push the Loyalists to greater dedication, holding Brask as an example of true sacrifice. His remains were transported to Croi where they have rested ever since.
  • The Xnocian Skull - The ancient traditions of fealty and honour amongst the White Scars are many and complex, woven as they are between many tribes once unified under the Great Khan. Amongst these many traditions is that of honour gifts, where the spoils of a glorious hunt or battle are given to a trusted comrade to make stronger the ties that unite them, a ritual that dates back to the Khan's days when tribes fought as one against their oppressors. The skull that is honoured with a place in the chapters reliquary is the one of the last of a Xenos species, one that a squad of Steel Hart and White Scars drove to extinction on the planet Xnocia, creating strong bonds of brotherhood during the hunt.
  • Iron Bastion - Brother Abban Cormac of the Deathwatch bore this shield into battle alongside Brother Kolver Santo of the Iron Hands on the Space Hulk Starflare, attempting to retrieve an STC fragment suspected to be lost upon it. The Hulk was overrun with Genestealers, and while retreating from the Hulk with the STC fragment Brother Cormac sealed the damaged doorway to the hanger their Corvus Blackstar was stationed in with his Storm Shield, holding the Genestealer Patriarch at bay and allowing the wounded Santo to escape. When Santo dragged the remains of Cormac to the Watch Station, he was intered into a Deredeo Pattern Dreadnought. In honour of this act Santo crafted an Artificer Storm Shield which he presented to the Steel Hart.
  • Umbra Talons - During the escape from the Drop Site Massacre of Istvaan V, Line Company Cervus rescued many Loyalist Legionaries, including Raven Guard Captain Vykar Teav. During their retreat to Terra, Teav presented his Lighting Claw, master crafted with mono-claws in place of power blades, to Legionary Sohcrah Tyr as thanks for saving his Company. Tyr carried the Claw into battle until he was interred into a Contemptor Dreadnought, when it was augmented to to fit so he could continue to serve with it.
  • Gáe Bulg - Crafted by Bright De Dannan, Fabricator General of Keltia, for Chapter Master Brynn Harkor and his successors after their defence of the planet in 397.584.34M against an invading force of Drukhari. Utilising ancient Archeotech, the Power Spear possesses a unique function among the Imperium, in that after it peirces the hide or armour of an enemy it is capable of flooding them with thousands of volts of electricity, downing even the largest of foes in seconds.



Feel free to add your own


Feel free to add your own

Ultramarines Successor Chapters
2nd Founding Storm WraithsSwords of Guilliman
3rd Founding ImperatorsImperius RavagersSons of OdinSteel HartWarstalkers
4th Founding Blades of ElysiumStar Knights
5th Founding Knights of Guilliman
6th Founding Myrmidons
7th Founding Wardens of Orask
8th Founding Bronze Bastion
9th Founding
10th Founding Blue FlamesNova Knights
11th Founding
12th Founding Thunder LordsTidebreakers
13th 'Dark' Founding Icebound SonsSilver Centurions
14th Founding Castigators
15th Founding
16th Founding
17th Founding
18th Founding
19th Founding
20th Founding Ardent Shields
21st 'Cursed' Founding
22nd Founding Blades of Redemption
23rd 'Sentinel' Founding Grey SteedsSpace NagaWar Angels
24th Founding Battencian Heralds
25th 'Bastion' Founding Azure Ravens
26th Founding Blood ReaversExercitus Imperialis
Ultima Founding Avengers of TyranCobalt ConsulsDawn GuardiansDiamond KnightsEmerald VipersEpsilon TempestsImperius WardensSons of AthenaSteel SentinelsUmbral Spectres
Unknown Foundings CrimsonmarinesEmperor's LegionEmperor's Wardens
Renegades Sons of SomniusVoid Paladins

Third Founding Space Marine Chapters
Dark Angels Successors Blades of the LionJudicatorsLion's PraetoriansLion's RegentsSilver LionsWhite Lions
White Scars Successors Falcon's ClawsSolar Falcons
Space Wolves Successors N/A
Imperial Fists Successors Astral PaladinsBlack MastodonsCrimson RobesImperial SentinelsIronclad TemplarsPhrygian KnightsTempest Knights
Blood Angels Successors Blood BearersDraconian ImpalersHussars SanguineIron Spears
Iron Hands Successors Atomic GladiatorsHell Conquerors
Ultramarines Successors Armageddon SonsImperatorsImperius RavagersSons of OdinSteel HartWarstalkers
Salamanders Successors Ashen KnightsBrotherhood of EmbersDoom SentinelsEmber DrakesIgnitorsThe Pure
Raven Guard Successors Astral ReapersVoid Ravens
Unknown Lineage Champions of MortisGolden TorchesPenitent KnightsSteel HarbingersZero Legion

Notable Quotes

By the Steel Hart

"Chaos frequently fills our thoughts with great schemes, so that instead of putting our hands to what work we can do to serve the Emperor, we may rest satisfied with wishing to perform impossibilities."
— Chapter Master Kyr Ingoldt

About the Steel Hart

"Did you not even care to repaint your armor, Son of Iron, or is that another one of your pathetic marks of 'Penance'? Your self-loathing does discredit to the strength your forbears showed, and your blood will never be free from your betrayal."
Valkyura Warpschild mocking a Steel Hart Marine.
"Seared scars on impure flesh, wounds of old made hot and fresh, purge their souls of taint perceived, till unfound redemption they seek received. "
—Unknown Mortarchs Serpentia Marine
"Captain, they are preparing to charge the gun line again, it seems they are intent to break through regardless of casualties... Affirmative... Yes sir, I'll keep them distracted till you're ready."
—Unknown Obsidian Blades Marine
Feel free to add your own
Community content is available under CC-BY-SA unless otherwise noted.