|Battle Cry||Unknown. Possibly homicidal screaming or yelling "HONOUR" over and over again.|
|Successors of||Imperial Fists|
|Successor Chapters||Crimson Axes, Iron Champions, Skull Bearers|
|Chapter Master||High Executioner Arkash Hakkon|
|Homeworld||Twin worlds of Stygia-Aquilon|
|Strength||Fewer than 1,000 Marines and declining.|
|Specialty||Close-combat and Head-Hunting|
|Colours||Blue-Grey with Red|
"You may cleave to your courage but that will fail you, look to your weapons but you will find them not enough. Run, fight, hide, pray, cry out or cower -- it does not matter, for we are coming."
- – Fafnir Rann, first High Executioner
"The man who passes the sentence should swing the sword."
The Executioners are a Chapter of Space Marines created way back in the ancient days of 1st edition, and then remade by Forge World for their take on the Badab War in Imperial Armor 9 and 10. They are a successor chapter to the Imperial Fists, but if one were to look closer they probably wouldn't be able to see many similarities. Think the World Eaters if they stuck far more closely to the "honourable" side of Khorne paired with the sheer stubbornness and grit of the Iron Warriors. Their founding Chapter Master, Fafnir Rann, has been portrayed in the Heresy books as right-hand man to Sigismund and leader of the Legion's most prestigious assault cadre (though he actually preferred to fight as a breacher), so the Executioners can be seen as an aspect of the old VII Legion that isn't really seen in the modern Chapter.
They're notable for being one of the four secessionist chapters that fought alongside the Astral Claws during the Badab War. Their motives were not heretical, instead they were fulfilling a debt to the Astral Claws who saved their asses a couple millennia before. Whether this falls into the category of Lawful Stupid is up to interpretation, but point is being that they turned against the Imperium solely based around honour and brotherhood. Which sounds suspiciously like the War Hounds before they became the World Eaters...the War Hounds specialized in close combat, too and were famous for their particularly strong sense of brotherhood.
Most of their beliefs and combat doctrine derives from the Feral Worlds they recruited from, resulting in a high emphasis on honour, dignity, and of course glorious close combat. Of course this can result in a lot of infighting and conflict within the chapter, where it can easily turn into bloodshed unlike say the Space Wolves. Because of this the Executioners also have an unusually high amount of Chaplains in order to keep the Marines in line and to encourage them on the battlefield. They also have a preference for taking the heads of their enemies as trophies, obviously earning them the distrust of the Inquisition.
Like every single other Chapter specializing in close combat, the Executioners curbstomp the shit out of everything and everyone. It's almost as though Space Marines have super-human bodies for a reason other than holding big guns anyone in powered armor could use.
The Executioners have their roots in the VII Legion's Assault Cadre (misleadingly named though, as they seem to have all been breachers, which means they assaulted enemy positions in the modern and Great Crusade sense of the word) under the command of Seneschal Fafnir Rann. Which is to say that their forebears fought in all the same brutal battle as Sigismund and the future Black Templars, including the Battle of Pluto and the Siege of Terra. Presumably they stayed at Rogal Dorn's side through the Scouring and subsequent wars until the Third Founding, when they became their own Chapter. Unlike most of their cousins, the only real links that the Executioners really care to maintain are those with their own Successors.
As a result they came to bear little resemblance to the Legion they sprang from, becoming not unlike the Wolves of the Great Crusade era, distrusted by many on their own side and regarded as barbarians, and ever keen to punish anyone who turned against the Emperor. Thus they remained for millennia, kicking ass and taking heads. Until some fucker over by the Maelstrom threw a big old spanner into the works.
As mentioned before, the Executioners fought alongside the Astral Claws during the Badab War. However, they always refused to work directly under Lugft Huron, instead working in separate battlefields by themselves and even sparing survivors if their objectives were met. Of course, this pissed the Tyrant off to no end, especially when they turned on the Astral Claws when they had a disagreement over what to do about a surrendered force of Loyalist Space Marines. Of course, the idea of Space Marines surrendering is rather ridiculous, but the loyalists probably didn't see the Tyrant's side as traitors so much as "doing their duty even when it pisses off the High Lords" and so might have seen themselves as surrendering to fellow loyalists. Not dishonorable or cowardly and spares them the need to keep killing their cousins and brothers. Not that it stopped them from tearing a new one to the Howling Griffons when upon their arrival to Badab, the bulk of the chapter fell upon the Khymera outpost located in the fringes of the sector, effectively knocking the griffons out of the war.
During a particularly violent Zone Mortalis action, an entire company was wiped out to the man by the Carcharodons, but not before they managed to deal the same blow in return. It is only known because a Loyalist naval patrol found the battlefield strewn with both Executioner and Carcharodon bodies, all in various states of dismemberment. No survivors were found amongst the bodies and both sides refuse to say anything about it. But with all things considered, the Executioners are technically the only chapter to win a battle against the Space Sharks. Keep in mind, this is the same chapter who waged practical genocide on Badab Prime and who basically trashed Abaddon's 7th Black Crusade. Most likely the Sharks lost themselves to their bloodlust and the Executioners don't want their fellow Space Marines to suffer for it. Because tattling is dishonorable.
The crunch moment came during 'The Red Hour when the Executioners caught the ship of Pellas Mir'san, the Salamanders captain who led their detachment in the Badab theatre. Mir'san did the sensible thing and surrendered, only for a group of Astral Claws to rock up and begin murdering the Salamanders for their gene-seed. Realising that they'd been abetting a monstrous crime and receiving a tongue-lashing from Mir'san, Thulsa Kane of the Executioners flew into a rage and attacked the Astral Claws in turn. A savage battle resulted, and once that was done the Executioners left the Salamanders to escape. What followed for the Executioners was a long and brutal campaign of attacks on their former allies, though the Loyalists continued to hunt for them.
Eventually, the Sons of Medusa and Carcharodons drew up plans to hunt down and destroy the Chapter once and for all. However, this bloody end was averted by Mir'san, who considered himself in debt to Kane. Probably also because of their conduct proving they were not traitorous or Chaotic at all, otherwise Mir'san wouldn't have gotten involved. Interrupting a fight between the Night Hag and two Sons of Medusa ships, he successfully talked Kane into surrendering (thus proving that Salamanders can be cool when written properly). The Executioners quit the war zone while their command company were escorted to Nocturne, where they would wait out the rest of the conflict.
After the secessionists surrendered, the Executioners were put on trial by the Loyalists alongside the other traitors. After some probing by the Inquisition and being vouched for by the Salamanders, who fought in the war against them, they were deemed redeemable by the court. They were sent on a century long penitent crusade and were not allowed to recruit any new neophytes. In the opening years they were actually pretty damn successful, taking down a pocket empire within the galactic core that was supported by three separate Traitor Legions and another Titan Legion. Even after that, they took down a fucking heretical Rogue Trader Dynasty (which seems to be becoming a speciality of theirs, they acquired their flagship that way). Currently they're killing Necrons in and around the Orpheus sector.
With the coming of 8th Edition, updated rules for Thulsa Kane, and most chapters being reinforced by Primaris Marines, there may be hope for the Executioners. Though considering they're balls deep in Necrons and still haven't had a fluff mention even after the Indomitus Crusade, we won't know for sure.
Last edition's Forge World chapter tactics for the Executioners allows them to ignore any negative Leadership modifier of any kind. (including from lost combats?) Also, all characters, from Sergeants to Captains, gain Instant Death on to-wound rolls of six, but they must issue and accept challenges. If it wasn't obvious before, Executioners are a melee-based army where even Scouts could potentially keep a unit locked into assault and a basic Sergeant with a Power Sword could knock down special snowflakes. In other words, these guys are true Space Marines taking full advantage of their superior biology, armor, and weaponry to win.
Their special character comes in the form of Thulsa Kane, a Chaplain with a 2+/4++ save, Plasma Pistol, and a S6 Power Axe. Along with Zealot he has Eternal Warrior and allows any friendly model (a single model) within 12" of him to reroll to-wound rolls of one the turn they charge. Bit situational, but can prove useful sometimes, especially if said model is a Dreadnought. His set Warlord trait allows all friendly units to add +1 to assault results and sweeping advance whenever Kane is in a challenge (if he's not, you're doing it wrong). And remember, Instant Death on to-wound rolls of six applies to Kane as well.
No FW chapters have unique tactics yet. As Imperial Fist descendants, they should probably take that tactic, although Black Templars may suit them better. Kane does have an update, however, and is one of the few characters from Badab to come out better in 8th. He is still an impressive beatstick while buffing nearby units with his various auras, and has increased damage in melee if the target is a character.
With the FAQ and Errata having come out you can use “Parent Codex” rules (pretty much a Counts As force) now that you can use the Blue Book, Blood Angels, Space Wolves, Dark Angels, or Death Watch, a Close Combat Oriented Chapter, such as BA or SW might be a better option (at least Crunchwise)
A personal favorite of this fa/tg/uy is using the BA Codex and giving him the “Artisan of War” Warlord trait, so Lifetaker does 3D minimum and 5D against a Character, making him rather thorough all round killer. Stick him by some Death Company or Vanguard Vets and let them go to work.
Another option is using The Space Wolves Codex and using the Saga of the Hunter trait to get him into combat faster, then you can use the Razorwolves tactic wrapped around Kane and a Battle Leader for ALL THE REROLLS