From 1d4chan
Invaders Shoulder Plate.png
Battle Cry Unknown
Founding Unknown
Successors of Imperial Fists
Successor Chapters none
Chapter Master The current one's dead
Primarch Rogal Dorn
Homeworld Fleet-based (formerly Ogrys)
Strength Currently 12 Marines, rebuilding
Specialty Fighting Eldar, Not giving a fuck about casualties
Allegiance Imperium
Colours Light Green with gold aquila and company color trim

Not to be confused with the Invader ATV.

The Invaders are a Space Marine background chapter that has picked up notice as Matt Ward likes to add them in his codices. They have the luck of Lamenters with the grit of Crimson Fists, often heading right into the next battle despite having little to no time to replace their losses.

Their biggest accomplishment was destroying Craftworld Idharae. How the hell they did that, nobody knows (it would seem they simply damaged it beyond repair, later Ward explained it was still recovering from Hive Fleet Naga and had lost most of its defences, but since Ward said it, most likely they just are that awesome or performed a Death Star run or something). It also seems that they took an insanely high number of casualties that they still didn't recover from in 43 years. When Alaitoc showed up with Idharea's survivors at their home world. Only three hundred made it out and they were forced to become fleet based. Which may or may not be a retcon, as other information also suggests it was a combined force from several craftworlds including Ulthwe. Of course, with no idea of their recruitment practices but full knowledge of their absolute badassery, it could be their standards are just so high that they have very few potential recruits at any time, drastically slowing their growth in exchange for having significantly superior Marines. They even were attacked by a xenos species called the "cell-kin". Exactly what its name implies, with a dash of the Flood. They won. This implies that you have to be the equivalent of the Master Chief to be recruited, which would explain why recruitment is so slow. And why a Craftworld, even damaged, got its teeth kicked in by these dudes. Then they decided to go fuck Eldar with chainswords. So, they did.

17 years later they lost two full Terminator Squads trying to teleport them down to the Necron World Engine. It's not clear whether they sent both squads at the same time or the second after seeing the first failing. After the Astral Knights blew the Engine to hell, the Invaders are presumably one of the chapters that guard the Astral Knights memorial museum on Safehold.

One year later, they try to liberate a planet that Ahriman took over, only to set off a trap that Ahriman made, which resulted in the planet being ripped apart by warp fire. By the time the Grey Knights showed up to fix the mess, only 12 of the 300 marines they sent were still alive. That anyone survived tells us everything we need to know about these manliest of Marines. Maybe they should have stuck to invading instead of liberating. They seem much better at it. Wait, why were they trying to liberate a Chaos-conquered world? Everyone was probably foaming at the mouth and scratching eight-pointed stars on their eyeballs by the time the Marines arrived. By the end of the millennium they were battling Iyanden and Hive Fleet Leviathan.

Their homeworld was named Ogrys, which sounds suspiciously like "Ogre" or "Ogryn". Perhaps the reason for their power is that they recruited from people who are basically Catachan ("little ogryns") or something. Pretty much abhuman or just about, huge, super-strong, and super-intelligent. Maybe now they solely recruit from their ships' crews, who would likely be natives of their homeworld. It's just an idea, but it makes sense given how much ass these guys have been kicking than ten Chapters combined would probably not even dare attempt let alone succeed at. They where given primaris marines for that they Roboute Gilliman.

Chapters of the Adeptus Astartes
First Founding
Blood Angels - Dark Angels - Imperial Fists
Iron Hands - Raven Guard - Salamanders
Space Wolves - Ultramarines - White Scars
Second Founding
Angels of Absolution - Angels Encarmine - Angels Porphyr
Angels of Redemption - Angels Sanguine - Angels of Vengeance
Angels Vermillion - Aurora Chapter - Black Consuls
Black Guard - Black Templars - Blood Drinkers
Brazen Claws - Crimson Fists - Destroyers
Doom Eagles - Eagle Warriors - Excoriators
Fists Exemplar - Flesh Tearers - Genesis Chapter
Inceptors - Iron Snakes - Libators
Lions Sable - Marauders - Mortifactors
Nemesis - Novamarines - Obsidian Glaives
Patriarchs of Ulixis - Purple Stars - Praetors of Orpheus
Rampagers - Raptors - Red Talons
Revilers - Silver Eagles - Silver Skulls
Soul Drinkers - Storm Lords - White Consuls
Wolf Brothers
Third to
Twelfth Founding
Astral Claws - Angels Revenant - Charnel Guard
Dark Paladins - Executioners - Flesh Eaters
Halo Brethren - Howling Griffons - Iron Knights
Mantis Warriors - Marines Malevolent - Night Swords
Sable Swords (initial) - Scythes of the Emperor - Space Sharks
Sons of Guilliman
Thirteenth Founding
Death Spectres - Exorcists
Fourteenth to
Twentieth Founding:
Angels of Fire - Avenging Sons - Celebrants
Twenty-First Founding
Black Dragons - Blood Gorgons - Fire Hawks
Flame Falcons - Lamenters - Minotaurs
Sons of Antaeus - Tiger Claws
Twenty-Second to
Twenty-Sixth Founding
Angels of Vigilance - Celestial Lions - Dark Hunters
Disciples of Caliban - Emperor's Spears - Fire Angels
Imperial Harbingers - Iron Lords - Knights of the Raven
Marines Errant - Mentors - Fire Claws/Relictors
Star Phantoms - Subjugators
Ultima Founding
Angels of Defiance - Black Vipers - Blades of Vengeance
Castellans of the Rift - Fulminators - Knights Cerulean
Knights of the Chalice - Knights of Thunder - Necropolis Hawks
Nemesors - Praetors of Ultramar - Rift Stalkers
Silver Drakes - Silver Templars - Sons of the Phoenix
Storm Reapers - Umbral Knights - Unnumbered Sons
Valiant Blades - Void Tridents - Wolfspear
Unknown Founding: Absolvers - Accipiters - Adulators
Angel Guard - Angels Eradicant - Angels of Retribution
Astral Knights - Blood Ravens - Blood Swords
Brazen Drakes - Brothers Penitent - Crimson Castellans
Crimson Consuls - Crimson Scythes - Dark Hands
Dark Sons - Death Eagles - Emperor's Shadows
Fire Lords - Guardians of the Covenant - Graven Spectres
Hammers of Dorn - Harbingers - Hawk Lords
Invaders - Iron Crusaders - Iron Talons
Jade Dragons - Knights of Blood - Knights Unyielding
Marines Exemplar - The Nameless - Night Watch
Rainbow Warriors - Reclaimers - Red Hunters
Red Scorpions - Red Seraphs - Red Templars
Retributors - Sable Swords (refounded) - Shadow Wolves
Solar Hawks - Sons of Orar - Star Dragons
Stormwatchers - Storm Giants - Storm Wardens
Valedictors - Viper Legion - Vorpal Swords
White Templars - Storm Wings
Unsanctioned Founding: Consecrators (founding unknown, but likely after 2nd Founding)
Sons of Medusa (separated from parent Chapters, ratified by edict)
Steel Confessors (de facto 22nd Founding, de jure ratified by edict)
Others: Astartes Praeses - Deathwatch - Grey Knights