What you need to know about Warhammer 40k Space Marines in 2023

Learn all about the Space Marines, or Adeptus Astartes, in this guide to the lore, characters, history and rules of the iconic Warhammer 40k faction.

Warhammer 40k Space Marines guide - Warhammer Community artwork showing an Ultramarines Primaris Lieutenant

Warhammer 40k’s Space Marines are the game’s most famous, popular, and prominent army. The power-armoured super-soldiers of the Adeptus Astartes are a perpetual favourite on the tabletop, supported by a vast range of miniatures.

These defenders of the Imperium of Man have been the public face (or rather faceplate) of GW’s sci-fi wargame since its inception in 1987. More than any of the other Warhammer 40k factions, Space Marines take the centre spotlight, whether in the lore-rich Horus Heresy book series, or the hundreds of distinct models backed up by rules in their Warhammer 40k codex army list.

Here’s your complete guide to Warhammer 40k Space Marines lore and gameplay:

Space Marines in 10th edition 40k

We’re starting to get information about Space Marines in 10th edition 40k. After a thunderous appearance in the Warhammer 40k 10th edition announcement trailer, GW revealed there will be 25 new Space Marine sculpts in the Warhammer 40k 10th edition Leviathan launch set. They’re also certain to be in the 10th edition Warhammer 40k starter sets – they are the stars of the show, after all.

New Space Marine units in 10th edition 40k

The Leviathan launch set is packed with new Space Marine models for Warhammer 40k 10th edition, including:

  • Captain in Terminator armor
  • Librarian in Terminator armor
  • Space Marine Terminators x 5
  • Apothecary Biologis in Gravis armor
  • Infernus Squad x 10
  • Vanguard Veterans x 5
  • Ballistus Dreadnought
  • Lieutenant in Phobos armor

Space Marines Oath of Moment

The Space Marines Oath of Moment is a solemn vow that the Astartes swear before embarking on a mission. In 10th edition, this provides a simple and powerful force multiplier. Each Command phase you’ll pick a single enemy unit, and your entire army will be able to re-roll Hit and Wound rolls whenever it targets that unit with an attack.

Warhammer 40k Space Marines oath of moment rules text by Games Workshop

Space Marines Gladius Task Force Detachment

The Space Marines Gladius Task Force Detachment will be included with the free Index rules when 10th edition launches. Warhammer 40k detachments work differently in 10th edition 40k compared to ninth. Each detachment provides your force with army-wide rules, six 40k stratagems, and a set of enhancements (similar to Warlord Traits or Relics), and may impose restrictions on how you construct your list.

Warhammer 40k Space Marines 10th edition Combat Doctrines rules by Games Workshop

The Gladius Task Force provides access to Combat Doctrines. These reflect the tactical flexibility of a standard marine force. There are three doctrines, each of which can be used once per game at the start of a Command phase, and each of which provides a different buff. Devastator Doctrine allows units to shoot after advancing; Tactical Doctrine allows a unit to shoot and charge in the same turn that it falls back from combat; Assault Doctrine allows a unit to charge after advancing.

The doctrines have a lot of utility. Assault doctrine extends your melee threat range, which could be a core gameplan for a melee-focused army, or a useful tool for claiming objectives. Likewise the Devastator doctrine can project the threat from your guns further, or allow you to claim an objective and still fire effectively with all your weaponry. Tactical Doctrine is a great defensive tool against melee-focused enemies, or a way to maintain momentum if your own assault gets bogged down by a tough enemy.

Warhammer 40k Space Marines stratagem 'Only in Death Does Duty End'

The Gladius Task Force Detachment comes with the Stratagem ‘Only In Death Does Duty End’. This costs 2CP, and means that whenever a model in a particular Space Marine unit is slain in melee, it gets to make its own melee attacks before it’s removed from the tabletop.

Warhammer 40k 10th edition Space Marine Chapters

In Warhammer 40k 10th edition Space Marine chapters don’t have the same role that they did in 8th and 9th edition. All Space Marine chapters share the same Oath of Moment army rules. Some Units and Epic Heroes have keywords that indicate they’re part of a particular chapter.

However, these keywords only come into play with certain Detachments: for example, marines with a chapter keyword other than Space Wolves can’t join the Sons of Russ Detachment. But you could use specialist Space Wolves units in a standard Gladius Task Force Detachment.

Warhammer 40k 10th edition Space Marine datasheets

Games Workshop has previewed several Warhammer 40k 10th edition Space Marine datasheets and snippets.

Space Marine Terminators

Warhammer 40k 10th Edition Terminator datasheet reveal - Warhammer Community image showing the full 10th edition Space Marine Terminator Squad datasheet

Space Marine Terminators now have a chunky toughness of five and 4+ invulnerable save. Their Teleport Homer can be placed anywhere outside the opponent’s deployment zone: during the battle they can deploy close to the Teleport Homer at the end of the opponent’s movement phase, using the new Rapid Ingress Stratagem. They’re not the only unit that will be able to use the Stratagem, but Terminators using a Teleport Homer can do so for no CP.

Space Marine Terminator Librarian

The Space Marine Terminator Librarian has similarly improved Toughness and Invulnerable save. He also demonstrates how psychic abilities have been reworked for the new edition of 40k. His psychic power Smite is now a shooting attack, while Veil of Time grants a unit that he is leading the Sustained Hits 1 Weapon Ability, meaning their to-hit rolls of six score an additional hit.

Space Marine Rhino

Warhammer 40k Space Marines Rhino APC datasheet by Games Workshop

The Space Marine Rhino armored transport is a little tougher than it was in ninth edition, and regains the ability to self-repair, and for models to fire out of its top hatch as it did in older editions of 40k.

Roboute Guilliman

Warhammer 40k Space Marines Roboute Guilliman datasheet

Primarch Roboute Guilliman is a super-sized commander and force multiplier. He has substantial melee prowess with the Emperor’s Sword and Hand of Dominion, which will reap through infantry and enemy armor respectively, but his main capability is as a leader.

His ‘Author of the Codex’ ability grants him a choice of three auras each command phase. ‘Primarch of the XIII’ boosts the Objective Control stat and resilience to Battle-shock of Marines within 6″; Master of Battle allows you to pick a second enemy unit to target with an Oath of Moment (though you must destroy the first target before moving onto this one); and Supreme Strategist allows you to target a marine unit within 12″ with a Stratagem for 0CP, even if you use that Stratagem on another friendly unit in the same turn.

What with his golden halo, Guilliman is just too obvious a target to benefit from the Leader ability which would allow him to hide inside a unit. However, the ‘Ultramarines Bodyguard’ ability means he benefits from the Lone Operative ability while within 3″ of a Space Marine infantry unit, meaning enemies can’t target him until they’re within 12″.

Once close enough, they have to contend with Toughness nine, 10 wounds, a 2+ save and 4+ invulnerable save. And should he be slain, the armor of Fate allows him to return from death on a roll of 3+. In short, he looks like an absolute unit.

Space Marine Land Raider

Warhammer 40k Space Marines Land Raider datasheet

The Space Marine Land Raider‘s model is the size of a brick, and it has appropriate rules: Toughness 12, 16 Wounds, and a 2+ save, in an edition where armor-penetration is restricted to dedicated anti-tank ordnance. The Assault Ramp on the front of the Raider allows a unit to disembark from it to charge in the same turn, even if the Raider moved first.

Primaris Lieutenant

Games Workshop revealed the leadership capabilities of the ubiquitous Primaris Lieutenant on April 11. Most characters in 10th edition will boost troop effectiveness by joining units, rather than projecting a buffing aura. The unit the Primaris lieutenant joins will score automatic wounds on to-hit rolls of six, by granting them the Lethal hits weapon ability. The unit can also declare a charge or shoot in a turn when it falls back.

Most units can only be joined by one Leader, but the Lieutenant can serve as a second-in-command alongside a unit lead by a Captain or a Chapter Master.

Warhammer 40k Space Marines - Warhammer Community artwork showing the Primarchs at the Ullanor Triumph

Space Marine legions

In 40k lore, the Space Marine legions were the first organised armies of Adeptus Astartes warriors – formed and blooded in the 31st millennium – ten millennia before the setting’s ‘present day’.

The Emperor of Mankind created 20 vast legions of transhuman marines – the Legiones Astartes – using a combination of his own genius, and the work of many genetic scientists (chief among them Amar Astarte, after whom the resulting warriors were named). They were intended to be the spearhead of a Great Crusade that would reconquer all the domains of mankind across the galaxy.

Each legion was many thousands strong, and each was bred exclusively from the genetic material of one of the Imperium’s extraordinary Primarchs: uniquely advanced primogenitor marines made from the Emperor’s own genetic code, each of whom acted as a crusading general at the head of his allotted legion.

Warhammer 40k Space Marines - Warhammer Community photo showing a Horus Lupercal bookend

The Primarchs and their legions fought alongside one another for many years in the Great Crusade, successfully expanding the Imperium far and wide throughout our galaxy – latterly under the leadership of Horus Lupercal, Primarch of the XVI Legion, named ‘Warmaster’ by the Emperor himself.

Then, tragically, nefarious Warhammer 40k Chaos forces intervened. Several times.

Thanks largely to the cunningly laid schemes of Erebus, of the Word Bearers legion, Horus Lupercal was turned to the service of the Chaos gods, and launched a civil war against the Emperor’s rule (later known as the Horus Heresy).

From the Heresy’s initial, devastating ambushes at Istvaan III and V -and for all time thereafter – the 18 Space Marine legions were to be split by Imperial historians into two camps: they were loyalists, or they were traitors.

Legion Primarch Allegiance
I Legion – Dark Angels  Lion El’Jonson Loyalist
 III Legion – Emperor’s Children Fulgrim Traitor
IV Legion – Iron Warriors Perturabo Traitor
V Legion – White Scars  Jaghatai Khan Loyalist
VI Legion – Space Wolves Leman Russ Loyalist
VII Legion – Imperial Fists  Rogal Dorn Loyalist
 VIII Legion – Night Lords Konrad Curze Traitor
IX Legion – Blood Angels Sanguinius Loyalist
X Legion – Iron Hands  Ferrus Manus Loyalist
XII Legion – World Eaters Angron Traitor
XIII Legion – Ultramarines  Roboute Guilliman Loyalist
 XIV Legion – Death Guard Mortarion Traitor
XV Legion – Thousand Sons Magnus the Red Traitor
XVI Legion – Luna Wolves / Sons of Horus Horus Lupercal Traitor
 XVII Legion – Word Bearers Lorgar Traitor
XVIII Legion – Salamanders Vulkan Loyalist
XIX Legion – Raven Guard  Corvus Corax Loyalist
XX Legion – Alpha Legion Alpharius and Omegon Traitor

We’re going to give you a bit of a spoiler here: the loyalists won. The Emperor killed Horus aboard the Warmaster’s attacking flagship, the Vengeful Spirit; the traitor forces splintered and fled; and the loyalists chased the routed remainders of the invading fleet right into the dreaded Eye of Terror. If you want to know what happened to them, read our guide to Warhammer 40k’s Chaos Space Marines.

And, as of 2022, with Games Workshop re-launching the Warhammer: The Horus Heresy tabletop wargame with the massive Age of Darkness box set, you can now collect and lead your own Heresy-era Space Marine legions.

For now, though, we’re interested in what happened next for the Space Marines who remained loyal to the Imperium of Man. 

Warhammer 40k Space Marines guide - Warhammer Community artwork showing Roboute Guilliman, Ultramarines Primarch

Space Marine chapters

Shortly after the Horus Heresy ended – with the traitor Warmaster’s death, and the enshrinement of the mortally wounded Emperor upon the Golden Throne – Ultramarines Primarch Roboute Guilliman reformed the Space Marine Legions into a host of much smaller Space Marine chapters, intending to ensure that never again could such a vast force of Adeptus Astartes turn, as one, against the Imperium.

In a decree titled the Codex Astartes, Guilliman ordered that the legions be reformed into Chapters with a maximum of 1,000 Space Marines in each, and prescribed codes of combat to guide them. This event, called the Second Founding, created a whole range of brand new ‘successor’ chapters, split off from their parent legions, with their own leaders, livery, and insignia.

Now, 10,000 years later, in the 41st millennium, there are thousands of Space Marine chapters active across the galaxy, but among the mightiest remain the so-called ‘First Founding’ chapters – formed from the original Legiones Astartes who stayed loyal.

Some follow Guilliman’s edicts in the Codex Astartes all these millennia later – others, not so much – and all but the lucky Ultramarines are now missing their Primarchs, as every single one, except Roboute Guilliman, is either dead or lost in action. All of the chapters have a codex supplement, though some of these are leftovers from 8th edition Warhammer 40k. Let’s meet them.

Dark Angels

The former I Legion Astartes, the stern, secretive Dark Angels hail from the forest planet of Caliban. Or rather, the remains of the planet Caliban – the world itself was destroyed, but the Dark Angels chapter still sails the void in a huge spacecraft built from a fragment of the dead planet, which they call The Rock.

During the Horus Heresy, a large portion of the Dark Angels legion turned to Chaos, leading to a huge, ultraviolent confrontation that saw the loyalist side victorious (but decimated), the planet Caliban itself shattered to bits, and the surviving traitor Dark Angels scattered out into the galaxy.

The loyalists have been hunting down these ‘Fallen’ ever since in a quest for absolution for their chapter. In the 41st millennium, as a Codex compliant chapter, the Dark Angels are still on this mission of redemption, with multiple successor chapters aiding them.

In battle, the Dark Angels are all about coordinated strikes from specialised ‘wings’, each used to maximum effect. Ravenwing bikers, land speeders, and flyers harry the foe with fast-moving cavalry charges, while a core of ranged infantry fire off fusillades of plasma fire from drilled battle lines. Then, once enemy lines are weak, the terminator-armored Deathwing knights crash in to finish them off. Dark Angels take some balance to play, but they can be devastating.

If you want to learn more about them, dive into our full Warhammer 40k Dark Angels guide.

Books you need to play Dark Angels

Dark Angels use the ninth edition Codex Space Marines, plus the ninth edition Codex Dark Angels supplement.

Dark Angels bundles

The recently released Wrath of the Soul Forge King box set, previewed at the Las Vegas Open on January 27, sees the Dark Angels defend their chapter fortress The Rock against the powers of Vashtorr the Arkifane.

There are 16 Dark Angels models in the battle box set:

  • Primaris Supreme Grand Master Azrael
  • Deathwing Terminators x 5
  • Primaris Intercessors x 10
  • Dark Angels Primaris upgrade sprues x 2

The Combat Patrol: Dark Angels box contains:

  • Primaris Intercessors x 5
  • Inceptors x 3
  • Redemptor Dreadnought
  • Primaris Chaplain
  • Dark Angels Primaris upgrade sprues x 2

Warhammer 40k Space Marines guide - Warhammer Community photo showing White Scars models

White Scars

The White Scars – formerly the V Legion Astartes – are renowned as both one of the most popular Space Marine chapters, and one of the hardest to paint. The sons of Primarch Jaghatai Khan, a.k.a. the Warhawk, the White Scars were briefly neutral in the Horus Heresy, before coming down firmly on the side of the Emperor. In the 41st millennium, they’re still going strong, and compliant with the Codex Astartes, counting many successor chapters to their name.

Now, there’s no beating around the bush on this one: these folks are an incredibly on-the-nose sci-fi analogue for the mounted Mongol hordes of Genghis Khan, which conquered most of the (real) world in the 12th century. The language, names, cultural mores, and martial traditions of their home planet, Chogoris – and all who hail from there – are strongly coded around real-world East Asian and Steppe cultures.

While these themes are sometimes used to create exciting fiction and super-cool in-game content, they’re not too subtle, or particularly diligently tied to any real history. Your mileage with this may vary – but it’s something to be aware of.

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In battle, the White Scars are all about speed and tactical agility, with rules and abilities that favour swift assaults and sly manoeuvring tricks to outfox enemy defences.

White Scars armies therefore tend to include a lot of bikes, land speeders, and other fast vehicles, as well as troop transports, to get their whole fighting force into the position in record time.

Books you need to play White Scars

White Scars use the ninth edition Codex Space Marines, plus the eighth  Codex White Scars supplement.

White Scars bundles

There’s no combat patrol for White Scars, but January 2023 saw GW release the Storm of Chogoris box set. It contains just ten models, but they are all pretty chunky:

  • Primaris Chaplain on Bike
  • Invader ATV x 2
  • Primaris Outriders x 6
  • Kor’Sarro Khan (on foot, the poor chap)
  • White Scars Primaris upgrade sprue

Warhammer 40k Space Marines - a Space Wolves Grey Hunter pack, painted by Nerodine

Space Wolves

Once the VI Legion Astartes, the lupine sons of Leman Russ – also known as the Emperor’s Executioners, among many, many other names – the Space Wolves command just as much respect and fear in the 41st millennium as they did in the 31st.

Warhammer 40k Space Marines guide - Warhammer Community photo showing Space Wolves Primaris models

Ferocious, instinctive fighters, they channel the spirit of their fearsome, furry namesakes by fighting in packs, and favouring vicious, overwhelming melee combat over big guns, or fancy footwork. It’s worth noting, too, that, in terms of cultural analogues, these guys are to Scandinavia as the White Scars are to Mongolia. Cold weather, Futhark runes, and plaited beards aplenty.

While they are as fiercely loyal to the Emperor as ever, the Space Wolves absolutely do not adhere to Roboute Guilliman’s Codex Astartes. We don’t know exactly how many Space Wolves Space Marines there are in the 41st millennium, but it’s significantly more than 1,000.

And, far from organising marines into ten companies of ten separate ten-marine squads, Space Wolves go to war in Great Companies, made up of many dozens of Wolf Packs, organised by battlefield role and seniority (or a mixture of the two). In short, they do things their own way, to the max.

Warhammer 40k Space Marines guide - Warhammer Community photo showing Space Wolves models including Ulfric the Slayer and Wolf Guard terminators

On the tabletop, this goes double; the Space Wolves have long had custom in-game rules that reflect just how different they are from your standard Space Marine.

A variety of unique, sharp-fanged units, such as Thunderwolf Cavalry, Fenrisian Wolves, and the terrifying Wulfen, combine with powerful close combat buffs and stratagems, to make Space Wolves one of Warhammer 40k’s most powerful melee armies.

Books you need to play Space Wolves

Space Wolves use the ninth Codex Space Marines, plus the ninth edition Codex Space Wolves supplement.

Space Wolves bundles

The Combat Patrol: Space Wolves box set contains:

  • Primaris Intercessors x 10
  • Invictor Tactical Warsuit
  • Primaris Reivers x 5
  • Primaris Lieutenant
  • Space Wolves Primaris upgrade sprue x 2

Warhammer 40k Space Marines guide - Warhammer Community photo showing Imperial Fists Primaris models

Imperial Fists

Originally the VII Legion, led by Primarch Rogal Dorn, the Imperial Fists are mostly famed for two things: their vivid yellow armor, and their prodigious skill at fortification and defence.

Put in charge of the protection of Terra (Earth) and its solar system during the Horus Heresy, the Imperial Fists and their Primarch won many great victories against Horus’ forces in the extended Siege of Terra, and were certainly vital to the loyalists’ survival under the onslaught of Chaos. Now, 10,000 years later, the Imperial Fists still share the reserved, sceptical, and stoic disposition of their blond-haired gene-father.

They follow the Codex Astartes – with a couple of dozen successor chapters to their name – and are based partly on Holy Terra, and partly aboard the Phalanx, Rogal Dorn’s enormous flagship-slash-fortress monastery.

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The Fists also retain their historic expertise where fortifications are concerned, boasting a variety of stratagems and custom psychic powers centred around tackling enemies in buildings, and a Chapter Tactic that lets them ignore enemies’ Light Cover when shooting at them – representing the Fists’ unmatched talent at spotting weak points in walls.

The stolid Imperial Fists may not be the most ‘rock n’ roll’ of Space Marine Chapters; nor, usually, are they the most competitively powerful – but their august history and striking colour scheme make them a favorite of many.

Books you need to play Imperial Fists

Imperial Fists use the ninth edition Codex Space Marines, plus the eighth edition Codex Imperial Fists supplement.

Imperial Fists bundles

The Bastion Strike Force released for Christmas 2022. This limited-run bundle contains:

  • Heavy Intercessors x 15
  • Primaris Aggressors x 3
  • Tor Garadon
  • Imperial Fists Primaris upgrade sprues x 2

Warhammer 40k Space Marines guide - Warhammer Community photo showing Blood Angels Primaris Assault Intercessors models

Blood Angels

Formed from the IX Legion Astartes, the Blood Angels are the gene-sons of the handsome, tragically clairvoyant Primarch Sanguinius, who was killed by his brother Horus Lupercal in the final battle of the Horus Heresy. They are led, in the 41st millennium, by Commander Dante, the oldest living Space Marine.

These scarlet-armored paragons are rightly celebrated as one of the Adeptus Astartes’ most devastating aerial assault forces, and deadly, elegant close-quarters fighters – with a notable streak of altruism and protectiveness over the Imperium’s human citizens that’s often absent in other Space Marine Chapters. But, while nobility and heroism flow through the proud Blood Angels’ veins, so too does their hidden Flaw, a disastrous fault in Sanguinius’ genetic code that lurks within every single Space Marine of the Blood Angels and their Successor Chapters.

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The Flaw can manifest in two ways:

The Black Rage

An agonising psychic echo of Sanguinius’ death at Horus’ hands is imprinted into the mind of every Space Marine of his geneseed. At any time – but usually in the midst of battle – this shared genetic memory can overtake them, filling them with all the vengeful fury felt by the Primarch at the moment of his death, and driving the Space Marine’s lesser mind completely insane.

Blood Angels taken over by the Rage are assigned to the Chapter’s infamous Death Company, and deployed where the fighting is thickest, to slake their insatiable anger with the deaths of enemies, before meeting their own end.

The Red Thirst

Buried deep in every Blood Angel’s genetic coding is an instinctive call to violence and bloodshed, which, if embraced and followed to the fullest, leads to an obsession with, and thirst for, the lifeblood of enemies. While the specific effects of the Red Thirst are the Chapter’s most shameful and best-kept secrets – rumours abound that its victims effectively become the vampires of legend, with sharp fangs, pale skin, extended lifespans, and a compulsion to drink living blood.

Warhammer 40k Space Marines guide - Warhammer Community photo showing Blood Angels Sanguinary Guard models

Still, if you can get over their potentially haemovorous tendencies, the Blood Angels are an ancient, storied, and distinctive Chapter to collect and play on the tabletop, with quite a few unique units to their name, such as the Death Company and Sanguinary Guard – learn more about them in our guide to the Blood Angels.

Books you need to play Blood Angels

Blood Angels use the ninth Edition Codex Space Marines, plus the ninth edition Blood Angels Codex Supplement.

Blood Angels bundles

The Combat Patrol Blood Angels box set contains:

  • Primaris Librarian
  • Impulsor
  • Primaris Intercessors x 5
  • Primaris Incursors x 5
  • Primaris Aggressors x 3
  • Blood Angels Primaris upgrade sprues x 2

Warhammer 40k Space Marines guide - Warhammer Community photo showing Iron Hands Primaris models

Iron Hands

Formerly known as the X Legion Astartes, the Iron Hands Chapter have a closer affinity with the technology-loving machine cult of the Adeptus Mechanicus than any other Space Marine Chapter, or perhaps any other branch of the Imperium. In battle, they’re renowned for fielding large numbers of tanks, Dreadnoughts, and other war machines, as opposed to massed infantry – and for encouraging augmetic body part replacements (or improvements, depending on your point of view) among their Space Marines.

This tendency towards mechanised warfare and cyborg enhancements is partly an expression of the personality of their dead Primarch, Ferrus Manus, the consummate engineer, who was decapitated by the traitor Primarch Fulgrim in the opening acts of the Horus Heresy.

But it’s also an attempt to ‘engineer out’ their human emotions, to purge their grief and guilt for Ferrus Manus’ death – as well as, originally, a straightforward practical measure to compensate for their miniscule numbers of marines, the Chapter having been gutted and routed in the infamous Istvaan V Drop Site Massacre.

Iron Hands have a weird history of being extremely dominant on the tournament scene towards the end of each edition of Warhammer 40k. Iron Hands were extremely potent towards the end of Warhammer 40k 8th edition due to a combination of rules that made all their units unusually survivable, while their vehicles kicked out devastating damage. This was balanced out with a rules FAQ in October 2019, however.

Currently, the Arks of Omen Balance Dataslate gives the Iron Hands a number of juicy advantages – check our full guide to the Iron Hands for an explanation.

Books you need to play Iron Hands

Iron Hands use the ninth edition Codex Space Marines, plus the eighth edition Codex Iron Hands supplement.

Iron Hands bundles

The limited run March of Iron Strikeforce, previewed on Warhammer Community on December 26 2022, contains:

  • Redemptor Dreadnoughts x 2
  • Intercessors x 10
  • Primaris Techmarine
  • Iron Father Feirros

Warhammer 40k Space Marines - Ultramarines lieutenant Calsius, painted by Nerodine


Of all the Space Marine Chapters, the Ultramarines probably need the least introduction. The ‘standard’, vanilla flavour of Space Marines, these disciplined, martial, Ancient Rome-inspired sons of Primarch Roboute Guilliman are the ultimate poster boys – both for the Imperium of Man and for Warhammer 40k itself, appearing on every box and every poster.

Starting life as the XIII Legion Astartes, at the time of the Horus Heresy, the Ultramarines were by far the largest Space Marine legion, numbering in the tens of thousands. Though they sustained heavy losses – including through the catastrophic surprise attack at Calth by the traitorous Word Bearers – it remained a massive fighting force throughout the Heresy, and spawned no fewer than 18 successor chapters when the Codex Astartes took effect.

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In the 41st millennium, the Ultramarines (and their dozens of successor chapters) form the core of the resurrected Primarch Roboute Guilliman’s efforts to restore and revitalise the Imperium.

They’ve played a prominent part in the game’s main storyline of late, as Guilliman fought off an attack on his own realm of Ultramar by Mortarion’s Death Guard (read Guy Haley’s excellent Dark Imperium trilogy for more).

If you want to don that shining azure armor and join the Imperium’s pre-eminent Space Marines chapter, best get clued up with our Warhammer 40k Ultramarines guide.

Warhammer 40k Space Marines guide - Warhammer Community photo showing Ultramarines models

Books you need to play Ultramarines

Ultramarines use the ninth edition Codex Space Marines, plus the eighth edition Codex Ultramarines supplement.

Ultramarines bundles

Warhammer Community first previewed the limited-run Scions of Macragge box set on December 26 2022. It contains:

  • Primaris Hellblasters x 10
  • Primaris Intercessors x 10
  • Bladeguard Veterans x 3
  • Chief Librarian Tigurius
  • Chapter Master Marneus Calgar and two Victrix Guard

Warhammer 40k Space Marines guide - Warhammer Community photo showing Salamanders Primaris models


The XVIII Legion Astartes, and a proud and resilient First Founding Chapter, the green-armored Salamanders are a rather distinctive lot, for a few different reasons.

Native to the volcano-covered Death World of Nocturne, and based in a fortress monastery on its moon, Prometheus, the Salamanders favour fire and flamer-type weapons, above all other chapters – as evidenced on the tabletop by their unique Flamecraft and The Fires of Battle stratagems.

In Warhammer 40k lore, the Salamanders, like their lost Primarch, Vulkan, are also uniquely concerned with the welfare of the Imperium’s human citizenry, capable of stubbornly refusing to cooperate with a battle plan if it involves severe collateral damage to civilian populations.

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In another questionable analogue to real-world human ethnicities, the Salamanders are also notable for their stone-hard, obsidian-black skin. Canonically, it’s caused by one of the Space Marines’ implanted extra organs, the Melanochrome, which causes their skin to change its colour and structure to protect against radiation-rich environments, in the same way humans’ skin evolved over millennia to be darker-coloured in sunnier climates – only orders of magnitude faster.

They’re pointedly not officially related to Earth’s black-skinned African ethnicities in any way – and yet, mysteriously, many Salamander characters in GW’s Black Library audiobooks are voiced with recognisable, yet non-specific African accents. More than anything, the Salamanders’ lore and real-world connections just seem disappointingly confused, and feel like a missed opportunity for Black African representation.

Warhammer 40k Space Marines guide - Warhammer Community photo showing a close-up of the Salamanders Adrax Agatone character model

Like various aspects of Warhammer 40k lore, this topic has sparked many unpleasant, and often very stupid, debates among fans. The bottom line is that the Salamanders make sense in-universe, but – like the White Scars, Space Wolves, and Sisters of Battle, among others – they’re evidence that Warhammer’s narrative roots were planted in a time when haphazard, ill-considered fictional representations of women and people of colour were commonplace. It’s not a reason to cancel them, just important context – and a valuable reminder of Warhammer’s golden rule: don’t be a dick.

Once you’ve squared that away, there’s loads to love about this army. With a Chapter Tactic and special rules themed around reliable, high-quality weaponry, they tend to be one of the more competitive Space Marine armies, too – check out our guide to Salamanders for some suggestions.

Oh, and Vulkan lives!

Books you need to play Salamanders

Salamanders use the ninth edition Codex Space Marines, plus the eighth edition Codex Salamanders supplement.

Salamanders bundles

Warhammer Community previewed the limited run Warforged Strikeforce box set on December 26 2022, containing:

  • Primaris Intercessors x 20
  • Primaris Aggressors x 3
  • Primaris Eradicators x 3
  • Adrax Agatone

Warhammer 40k Space Marines guide - Warhammer Community photo showing Raven Guard Vanguard Veterans models

Raven Guard

The XIX Legion Astartes, now the Raven Guard chapter, hold the triple distinctions of being the most ’emo’ Space Marine chapter; the stealthiest Space Marines; and the ones with the silliest names.

Their Primarch’s name, Corvus Corax, is literally the real-world Latin species designation for the common raven (and, individually, both those Latin words also mean ‘raven’). His chapter’s fortress monastery, on their homeworld of Deliverance, is called the Ravenspire. It’s serious overkill.

Still, with that out of the way, these alabaster-skinned, jet-black-haired Space Marines have a noble history of service to the Imperium – cruelly interrupted, like that of the Iron Hands and Salamanders, by being very nearly exterminated in the Istvaan V massacre.

The Raven Guard survived, however, and thrived, cultivating a name for themselves as silent, efficient killers, adept at achieving perfect positioning, before descending upon the foe from above to deal out sudden, sharp-bladed death. Codex Compliant, the Raven Guard boast a respectable family of successor chapters, including – most likely – the well-loved, shark-fancying Carcharodons chapter.

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In the 41st millennium, the Raven Guard are led by Chapter Master Kayvaan Shrike, who recently crossed the Rubicon Primaris, changing from a Firstborn marine into a Primaris Space Marine, and getting a gloriously moody new miniature in the process.

Warhammer 40k Space Marines - Warhammer Community John Blanche artwork showing a huge force of Black Templars

Books you need to play Raven Guard

Raven Guard use the ninth edition Codex Space Marines, plus the eighth edition Codex Raven Guard supplement.

Ravenguard bundles

The limited-run Ravenstrike Battleforce was released for Christmas 2022, and contains:

  • Primaris Rievers x 10
  • Invictor Tactical Warsuits x 2
  • Primaris Eliminators x 3
  • Primaris Librarian
  • Kayvaan Shrike 

Warhammer 40k Space Marines - Warhammer Community photo showing Black Templars primaris models

Space Marines successor chapters

In Warhammer 40k lore, there are many hundreds of known Space Marine successor chapters, so we couldn’t possibly cover them all – but there are a handful which have carved out more of a name for themselves than most – so we’ll tell you a little bit about those trailblazers.

What’s more, there are a number of Space Marine armies that stand apart from the main chapter structure – if you’re interested in the silver-armored, psychic, daemon-hunting Knights of Titan, check out our full guide to the Grey Knights.

If you lean more towards black-clad, alien-busting special ops Kill Teams, you’ll want to peruse our Warhammer 40k Deathwatch guide.

And if (like famous fan of Warhammer Henry Cavill) you feel drawn toward the golden light and preternatural fighting skills of the Emperor’s chosen bodyguards – check out our guide to the Adeptus Custodes.

In the meantime, though, let’s meet the:

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Black Templars

By far the largest and most storied Successor Chapter out there, the zealous, crusading Black Templars, more than any other Space Marine Chapter, the angry, vengeful, hate-fueled, religious fury at the heart of the Imperium of Man in the 41st millennium.

Though they were founded from the dour, reserved Imperial Fists, and are created from the very same geneseed – that of Rogal Dorn – the Templars personify that noble Primarch’s permanently subdued rage, unleashed, and focused through the refining prism of dogmatic belief in the Emperor’s divinity, to produce an unrivalled destructive force, powered by faith and fury.

The Black Templars don’t even come close to following the Codex Astartes, recruiting new Space Marines as widely as possible, and conducting vast, endless, thousands-strong crusades against the Imperium’s many enemies in all kinds of far-flung corners of the galaxy.

We’ll have a fully-fledged guide on the Black Templars soon, but for now, check out our coverage of the 2021 Black Templars army set, featuring a new Black Templars codex, and a bunch of brand new models for the Chapter.

Books you need to play Black Templars

Black Templars use the ninth edition Codex Space Marines, plus the ninth edition Codex Black Templars supplement.

Black Templars bundles

The Combat Patrol: Black Templars box set contains:

  • Primaris Crusader Squad containing five initiates, four neophytes and a Sword Brother
  • Primaris Intercessors x 5
  • Primaris Impulsor
  • Primaris Marshal
  • Black Templars Primaris upgrade sprue

Warhammer 40k Space Marines diorama - the Crimson Fists stand on Rynn's World. Diiorama by Games Workshop at Warhammer World, Photograph by Ramanan Sivaranjan

Crimson Fists

If the Crimson Fists Space Marines were a word, that word would be: ‘indomitable’. A less kind word might be ‘inflexible’.

Another successor chapter of Rogal Dorn’s Imperial Fists, their entire forces, fortress monastery, and home planet of Rynn’s World were almost entirely wiped out by an Ork Waaagh! from which they refused to retreat – but the chapter survived, by skin of its teeth, and by the legendary, unstinting courage of their Chapter Master Pedro Kantor, with just a few Space Marines left.

Since then, despite their minimal numbers, and the devastation of their home region of space, the Crimson Fists have dutifully followed the Codex Astartes, and built a martial reputation around their knack for stubbornly holding ground. Even their tabletop Chapter Tactic reflects it: appropriately titled No Matter The Odds, it grants Crimson Fists models a bonus to hit, if they’re shooting at a unit with at least five more models in it than the shooter’s own. Worth choosing if you like to make a stand.

Books you need to play Crimson Fists

Crimson use the ninth edition Codex Space Marines, plus the eighth edition Codex Imperial Fists supplement.

Warhammer 40k Space Marines guide - Warhammer Community photo showing Flesh Tearers firstborn space marine models

Flesh Tearers

The Blood Angels’ most famous Successor Chapter, the Flesh Tearers, have a well-deserved reputation for ferocious bloodlust (the clue’s in the name). Shunned by their parent chapter and the other Successors for their uncommon, occasionally uncontrolled brutality in battle, the Flesh Tearers have come close to being excommunicated from the Imperium and designated Renegades, but have always been exonerated as loyal – though just barely.

With their strain of their Primarch’s geneseed especially prone to Sanguinius’ genetic faults, more Flesh Tearers succumb to the Black Rage and Red Thirst than any other Blood Angels Successors – adding to their reputation for unchained slaughter, and suspicions of Chaos corruption.

Their Chapter Master, Gabriel Seth, mitigates the worst of this by committing his troops as vanguard forces right into the thick of every assault, hoping to sate their desire for bloodletting, and minimise chances of the Flesh Tearers losing control and tearing into their own allies.

The arrival of Primaris Space Marine reinforcements has also reportedly been a stabilising influence, as they appear more resilient to the pitfalls of Sanguinius’ infamous genetic ‘Flaw’.

Books you need to play Flesh Tearers

Flesh Tearers use the ninth edition Codex Space Marines, plus the ninth edition Codex Blood Angels supplement.

Warhammer 40k Space Marines guide - Warhammer Community artwork showing an Ultramarines Primaris Lieutenant

Primaris Space Marines

The Primaris Space Marines are the pinnacle of transhuman soldiery, a more physically advanced, better equipped, upgraded version of the Space Marines, engineered over ten millennia by Archmagos Dominus Belisarius Cawl – an ingenious, eccentric, and decidedly dangerous senior Tech-priest of the Adeptus Mechanicus.

Introduced to the tabletop game and the fiction at the same time, with the launch of Warhammer 40k’s 8th Edition in 2017, the Primaris Space Marines started off with a small selection of up-scaled Space Marine characters and units – but, in 2021, they represent an entire new model range of their own.

Taller, stronger, and faster than the original ‘Firstborn’ Adeptus Astartes, clad in upgraded Mark X power armor, and equipped with a whole range of superior wargear, the Primaris marines do all the same things as their forebears – only  better.

On the tabletop, this difference is minor – the Primaris merely get one extra attack in close combat – but, in Warhammer 40k lore, the gulf between the Primaris and Firstborn is colossal and significant.

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Almost all the Space Marine Chapters have now had large influxes of Primaris Space Marine reinforcements delivered by elements of Roboute Guilliman’s Indomitus Crusade – and, where Primaris and Firstborn have suddenly begun to fight together, friction, distrust, and culture shock have resulted.

Entire new Space Marine Chapters, such as the Fulminators and Rift Stalkers, have been formed entirely of Primaris marines, in the so-called Ultima Founding, ordered by Roboute Guilliman.

Even prominent leaders among the Firstborn Space Marines have undergone arcane and painful surgery to be converted into Primaris marines – led by Ultramarines Chapter Master Marneus Calgar, and followed by many others, including the Black Templars’ High Marshal Helbrecht.

The burning question – both on the tabletop, and canonically in Warhammer 40k lore – is: are the Firstborn marines on the way out? Will the new and improved Primaris breed entirely replace the original Adeptus Astartes that have held firm in defence of the Imperium of Man for 10,000 years? Only time will tell.

Primaris Space Marine units include:

Unit Armament armor Role
Intercessors Boltrifles and variants Tacticus Troops
Heavy intercessors Heavy boltrifles and variants Gravis Troops
Assault intercessors Heavy bolt pistol and astartes chainsword Tacticus Troops
Veteran intercessors As intercessors and assault intercessors Tacticus Elite
Hellblasters Plasma incinerators and variants Tacticus Heavy
Aggressors Boltstorm gauntlets or flamestorm gauntlets Gravis Elite
Inceptors Paired assault bolters or plasma exterminators Gravis Fast
Eradicators Melta rifles or heavy melta rifles Gravis Heavy
Bladeguard Veterans Mastercrafted power swords and storm shields Tacticus Elite
Desolation squad Indirect-fire castellan launchers, plus superkrak or superfrag missiles Tacticus (Probably Heavy)

Warhammer 40k Space Marines - a Space Wolves Primaris Repulsor tank, painted by Nerodine

Primaris Space Marine vehicles include:

Vehicle Chassis Role
Redemptor Dreadnought Redemptor General support walker
Brutalis Dreadnought Redemptor, up-armored Front-line melee walker
Repulsor Repulsor Heavy troops carrier and support weapon platform
Impulsor Impulsor Light troops carrier
Repulsor Executioner Redemptor Heavy tank and limited troops carrier
Storm Speeder Hailstrike Storm Speeder Mobile anti-infantry
Storm Speeder Thunderstrike Storm Speeder Mobile heavy fire platform
Storm Speeder Hammerstrike Storm Speeder Mobile anti-tank
Gladiator Lancer Impulsor Light, ranged tank-hunter
Gladiator Reaper Impulsor Light anti-infantry
Gladiator Valiant Impulsor Light, close tank-hunter

Warhammer 40k Space Marines guide - Warhammer Community artwork showing a codex diagram of a Vanguard Space Marine Infiltrator in Ultramarine colours

Vanguard Space Marines

The Vanguard Space Marines, introduced to both the tabletop game and Warhammer 40k lore in the 2019 Shadowspear box set, are a specialised sub-set of the Primaris Space Marines, kitted out for covert operations, stealth, sabotage, and reconnaissance.

Vanguard Space Marines wear a modified version of the standard Primaris Mark X power armor, designated ‘Phobos’ pattern, which does not alter their in-game defensive stats, but does make them eligible for certain stratagems and psychic powers.

Probably the most popular Vanguard Space Marine units have been the Infiltrators and Incursors – alternative Troops choices to the vanilla Primaris Intercessors, which each offer their own added tactical advantages.

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Both units can deploy anywhere on the board more than 9″ from enemy units; the Infiltrators have an aura that blocks enemy Deep Strikes, and can use a five-point upgrade to benefit from your HQs’ aura buffs wherever they are; while the cheaper Incursors have boltguns that ignore cover, and can place anti-vehicle Haywire Mines.

Prominent Vanguard Space Marine units include:

  • Infiltrators
  • Incursors
  • Reivers
  • Suppressors
  • Eliminators 

Warhammer 40k Space Marines guide - Warhammer Community artwork showing Morvenn Vahl, Abbess Sanctorum of the Sisters of Battle

Female Space Marines

So, why aren’t there any female Space Marines? As you might imagine, it is a vexed question.

Women can join the Astra Militarum, a.k.a. Imperial Guard; women fight the enemies of the Imperium as Sisters of Battle; women have equal status in the Adeptus Mechanicus; and women have always served at all ranks in the Imperial Navy, as well as every level of the civilian government, in all corners of the galaxy-spanning empire of humanity. So why are there no women in the Emperor’s most elite fighting forces?

The commonly heard in-universe answer (usually made up on the spot by sexually insecure male Warhammer fans, for whom the existence of powerful, dominant, and especially combatant female characters in any fiction is inexplicably enraging) normally involves a lot of waffle about how the Emperor’s gene-crafting processes ‘just weren’t designed’ for female bodies. As if it made any kind of sense for the nigh-omnipotent Emperor of Mankind to rule out half his subject human population as potential recruits.

The short, real-world answer is that game-makers shape their protagonists (and make no mistake, the Space Marines are the closest thing Warhammer 40k has to protagonists) to fit the aspirational, power-fantasy self-image of their core customer base; and, when GW created Warhammer 40k in the late 80s and early 90s, that core customer base was almost exclusively men and boys.

According to widely shared Facebook posts attributed to the former head of GW Intellectual Property Alan Merrett, the firm did make a few female Space Marine figures in the runup to Rogue Trader, Warhammer 40k’s first edition – but they sold poorly, and simply got dumped for that reason.

As Merrett says in one of the posts: “all the background fluff about why there are only male Marines is there to justify a commercial logistics issue”. That pretty much sums it up.

Will we get female Space Marines eventually? Hopefully; it would add some much-needed variety and representation in Warhammer’s most famous faction.

And GW has already taken one step towards it, by including women in the Stormcast Eternals, the Space Marines’ direct analogues in fantasy game Warhammer Age of Sigmar. So, here’s hoping. 

Warhammer 40k Space Marines guide - screenshot of Ultramarines captain Titus from the Space Marine videogame

Space Marine game

The Warhammer 40,000: Space Marine game, released in 2011 by publisher THQ and developer Relic Entertainment, is very possibly the best Warhammer 40k game ever made, for PC or games consoles.

It’s a videogame that focuses almost all its energy on the audio-visual rhythm and sheer serotonin-pumping, kinetic joy of its combat gameplay – and fills in the piffling details of story, characters, environments, level design, and other such distractions, afterwards.

Stepping into the ceramite boots of Ultramarines Captain Titus, you’ll lead your squad through the Ork-infested factories and streets of an embattled Adeptus Mechanicus Forge World, and along the way uncover a nefarious Warp plot hatched by a Chaos Space Marine sorcerer.

Frankly, though, most of that matters little – because what this game is about is living the weighty, muscular, metallic power fantasy of being a Space Marine. It’s like Gears of War, but with less forced, overcompensating masculinity and feigned emotion, and more guiltless, fluid, transhuman ultraviolence in the Emperor’s name. It’s unsettling, but oh so brilliant.

If you haven’t played it, why not? You’ve had a decade! Go and play it after reading this. There’s even a brand new Anniversary Edition now, rolling in all the DLC packs and a bunch of extras – so you really have no excuse.

Warhammer 40k Space Marines - official Focus Entertainment trailer screenshot showing Captain Titus as a Primaris marine in Space Marine 2

Space Marine 2

What’s more, there’s now a sequel – Space Marine 2 – on the way! Check out our running guide to keep up-to-date with the Space Marine 2 release date, as well as the latest news and trailers for the game. 

Warhammer 40k Space Marines guide - Warhammer Community graphic showing hundreds of space marine armor colour schemes

Space Marine colour schemes and paints

As the photo above should demonstrate, there are essentially no limits to the best miniature paints and colour schemes to use when painting your Space Marine army. GW’s vast library of lore has fleshed out colours, insignia, and varying amounts of narrative detail for several dozen of Space Marine chapters – and if one of these catches your eye, go for it.

If it happens to be one of the pre-eminent chapters listed in the sections above, which benefit from their own custom tabletop rules, all the better – but don’t sweat it if not. Paint your models the way you want, and then, when it comes to game time, treat them as whichever chapter you like.

Unless you’re participating in some super-strict narrative event, nobody should have a problem with it – and, if they do, they’re probably not worth playing with again. This is a game, remember – it’s supposed to be fun.

Warhammer 40k Space Marines - a Space Wolves Redemptor Dreadnought, painted by Nerodine

There are lots of different ways to approach painting the many different potential Space Marine colour schemes – as a first step, get your teeth into our comprehensive guide to painting miniatures. YouTube tutorials by Games Workshop, and those by the Duncan Rhodes Painting Academy, can also really help you get started here.  Once you’re ready to kick off, here are some standard Citadel Colour paint choices for most of the Space Marine chapters we’ve mentioned above:

Chapter Base paint Wash Layer Highlight
Dark Angels Caliban Green Nuln Oil  Waaagh! Flesh Warpstone Glow
White Scars Ulthuan Grey Agrax Earthshade Ulthuan Grey Praxeti White
Space Wolves Russ Grey Nuln Oil Fenrisian Grey Blue Horror
Imperial Fists Averland Sunset Casandora Yellow Dorn Yellow Ushabti Bone
Blood Angels Mephiston Red Agrax Earthshade Evil Sunz Scarlet Wild Rider Red
Iron Hands Abaddon Black Nuln Oil Dark Reaper Fenrisian Grey
Ultramarines Macragge Blue Nuln Oil Altdorf Guard Blue Calgar Blue
Salamanders Caliban Green Agrax Earthshade Warpstone Glow Moot Green
Raven Guard Corax Black Nuln Oil Eshin Grey Dawnstone
Black Templars Abaddon Black Nuln Oil Russ Grey Fenrisian Grey
Crimson Fists Kantor Blue Nuln Oil Alaitoc Blue  Hoeth Blue
Flesh Tearers Khorne Red Nuln Oil  Wazdakka Red Cadian Fleshtone

Because they have large, flat armor plates, Space Marines aren’t the best fit for most contrast paints, which work better on organic or heavily textured surfaces. However there have been some recent paints that do the job pretty well: Imperial Fists Yellow and Baal Red have very good coverage all over a mini, making them a great way to slap out some tabletop-ready Imperial Fists or Blood Angels nice and quick.

Warhammer 40k Space Marines guide - Warhammer Community photo showing the models in the Space Marines combat patrol box

How to start collecting Space Marines

We’re going to make this really, really simple, because there truly are so many different paths you can take with a Space Marine army nowadays.

Step one: get yourself a Combat Patrol starter box. There are vanilla Space Marines, Space Wolves, Dark Angels, and Blood Angels variants on offer, but each contains a mixed bag of solid, versatile Primaris Space Marine units that’ll work as a starter force, and that you can happily paint up as any chapter – so pick out whichever one has the models you like best.

Step two: play with that starter army for a bit, in small games, using the rules for different chapters in turn. Get a feel for what playstyle you most enjoy – do you like picking a strong defensive position, layering on buffs, and taking out enemies from range? Do you like quickly advancing, charging, and slashing enemies up in melee? Do you just really like Dreadnoughts? Learn what kind of Space Marine player you are.

Step three: Invest into whichever playstyle (and, if it feels right for you, an appropriate lore-accurate chapter) you liked best, and slowly build your army around its core strategy, adding new models that you like the look of, and which you think would play well in your list.

Warhammer 40k Space Marines guide - Games Workshop store photo showing details on an Ultramarines Intercessor model

Space Marines are so tactically flexible, and have so many model options, that there are very few wrong answers here, and you can grow your force as slowly, or as quickly, as you like.

Love the fast movement and manoeuvrability of the White Scars for getting your marines into the fight? Pick up a couple of bikes too, to benefit from their biker stratagems. Before you know it, you’ll have twenty of them revving across the table, backed up by missile speeders, and be drinking in the imaginary exhaust fumes.

Warhammer 40k Space Marines guide - Warhammer Community photo showing the Roboute Guilliman model

Addicted to the reliable offensives and straightforward force-multiplying abilities of the Ultramarines?

Paint up a couple more neat, shiny frontline Intercessor squads to open up new tactical options, and more pinpoint Bolt Rifle shots per turn – and it won’t be long before you’re lost in Roboute Guilliman‘s dreamy eyes and painting up the Primarch himself, to slather your forces in powerful aura buffs.

Space Marines are Warhammer 40k’s widest and deepest army, yet they remain among its most accessible, and, with a wider variety of possible paths to victory than almost any other faction, they always have the potential to surge once again to victories at Warhammer 40k’s top competitive tables.

After 30 years, they’re still the go-to army for most newcomers to Warhammer 40k, and with good reason – we can confidently recommend them as a way into the game and hobby alike. If you’re teetering on the edge of starting a Demi-Company of your own, we’d say go for it, don’t be afraid. You’re about to become one of the Emperor’s Angels of Death, after all – And They Shall Have No Fear.

Warhammer 40k Space Marines guide - Warhammer Community photo showing the 9th edition Space Marines codex front cover art, featuring Ultramarines intercessor marines

Space Marines codex release date

The current 9th Edition Space Marines Warhammer 40k codex was released on October 10, 2020 – you can order it now from the Games Workshop webstoreGames Workshop has confirmed that the Warhammer 40k 10th edition Space Marines codex will release in Autumn 2023. Free Index rules will be available for the Space Marines when 10th edition launches in Summer 2023.

Now isn’t a great time to pick up a Space Marines codex – the new edition is going to wipe the slate clean on 9th edition rules! 

Warhammer 40k Space Marines guide - Warhammer Community artwork showing Ultramarines Primaris marines in battle

Space Marines tactics in 9th edition

Space Marines tactics are extremely diverse. The many Space Marine chapters enjoy their own unique rules, reflecting their drastically different ways of making war.

Where an Ultramarines force will do its best work through coordinated fire and manoeuvre, flexible tactics, and volley fire, the Iron Hands might prefer tanks and heavy weapons – while Black Templars tend to eschew most tactical traipsing about, in favour of all-out furious assaults.


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Warhammer 40k rules have always faced a challenge in faithfully representing the canonically overwhelming offensive powers of Space Marines, while keeping them as a balanced army within the game’s meta.

In ninth edition 40k, this is achieved using a cluster of in-built rules for (almost) all Space Marines, called:

  • Combat Doctrines
  • Bolter Discipline
  • And They Shall Know No Fear

Warhammer 40k Space Marines guide - Warhammer Community photo showing Ultramarines Primaris models

Combat Doctrines

The Combat Doctrines rule grants Space Marines bonuses to their armor piercing (AP) stat on different weapon types. You start the game in the Devastator Doctrine, and – rules as written in the codex – will move onto the Tactical doctrine from turn two, with the option to progress to the Assault doctrine in turn three. As of the most recent matched-play balance dataslate, you don’t have to make that shift, and can spend all game in the Devastator Doctrine if you prefer.

Combat Doctrine Effect
Devastator Doctrine +1 AP for Heavy and Grenade weapons
Tactical Doctrine +1 AP for Rapid Fire and Assault weapons
Assault Doctrine +1 AP for Pistol and Melee weapons

Essentially, it rewards you for following a balanced, step-by-step battle plan: Fire the big guns at range in your first turn; move forward and shoot with your main troops in turn two; and charge in for a close-up scrap in turn three. For some chapters, like the Ultramarines, it’s perfect; for others, less so – but there are Stratagems to get around that, by temporarily changing the active Doctrine. A Space Marine always has options.

Space Marines keep Combat Doctrines in 10th edition 40k, albeit altered slightly: it’s only available to forces organised into a Gladius Task Force Detachment, each doctrine can be employed once per battle but during any round, and each doctrine provides a slightly different doctrine. You can check earlier in this guide to see the full rules.

Warhammer 40k Space Marines guide - Warhammer Community photo showing White Scars biker and land speeder models

Bolter Discipline

Dead simple, this one: Bolter Discipline means, when shooting ‘Rapid Fire’ weapons, you normally get to fire twice the normal amount of shots if your target is within half the weapon’s maximum range.

But, since Space Marines are really good at shooting their Bolt weapons, they will also get double shots with those guns if:

  • they’re an Infantry unit and they didn’t move this turn
  • they’re a Terminator or Biker

It means that, whether you’re playing a static, defensive force of Marines in cover firing Bolt Rifle volleys, or a super-fast shock force of Bikers, you’ll put out more shots, more of the time, over longer ranges than a lot of other armies. Plus, even if you’ve moved an Infantry unit, you can use the 2CP Stratagem Steady Advance to make it as if they hadn’t moved, and still benefit from the double shots.

Warhammer 40k Space Marines guide - Warhammer Community photo showing Primaris models in different colour schemes

And They Shall Know No Fear

And They Shall Know No Fear covers the fact that Space Marines literally have the neurological mechanisms for fear engineered out of them – their ‘fight or flight’ has been completely reprogrammed until it’s more like ‘fight or carry on without blinking’.

As a result, Space Marines get to ignore all modifiers to their Combat Attrition tests – meaning that, when they take losses in battle, the chances of them running away are a) low, and b) not affected at all by enemy units’ abilities that are supposed to damage leadership and morale.

This rule used to be a bit simpler, but the bottom line is: Space Marines hardly ever run from battle, regardless of whatever is facing them.

Warhammer 40k Space Marines - Games Workshop image showing a screenshot from the Space Marines animated miniseries Astartes by Syama Pedersen

armor of Contempt

If you’re newish to 40k, you might see battle reports or forum discussions that refer to ‘armor of Contempt‘. That was a rule that applied to Space Marines in matched play games, but at the moment, it isn’t part of the game.

Each Warhammer 40k matched play season features a Balance Dataslate, which tweaks the rules of factions to try and help them perform equally well. The June 2022 ‘Balance Dataslate’ introduced armor of Contempt, but the more recent Arks of Omen Balance Dataslate in January 2023 removed it again.

armor of Contempt was a powerful survivability buff for Space Marines (and Imperial Guard vehicles, Grey Knights, Sisters of Battle, and Chaos Space Marines). We’ve included the text below to help you understand any discussions involving it, but remember – it’s not currently part of the game.

Warhammer 40k Space Marines - Games Workshop graphic showing the details of the armor of Contempt rule

Narratively, the rule represented the fact that Imperial (and ex-Imperial) power armor suits and tank plating are tough – and extra-resistant to even the armor-piercing-est of guns.

In gameplay terms, the rule was intended to help these units – and especially rank-and-file Space Marines – survive for longer on tabletop battlefields now crowded with more and more high-damage, high-AP weapons that might otherwise wipe away entire elite Astartes squads with contemptuous ease – the recent Leagues of Votann have no trouble obliterating power-armored marines.

With thanks to Ramanan Sivaranjan for his photo of the Crimson Fists diorama at Warhammer World, and Nerodine for his Ultramarines Lieutenant Calsius and his Space Wolves Grey Hunters, Redemptor Dreadnought, and Repulsor.