Separatists

Though the Separatists had different visions of a perfect galaxy, all could agree that the Imperium had failed and that their vision would prove the best direction for the galaxy. Formed in a loose confederacy, each Primarch and legion carved out its own domain, joined only in trade and defence. Opposed to both the Imperium and the Traitors, the high-minded leaders of the Separatists hoped to forge a new pathway for humanity.

Legiones Astartes

 * Monastic Ascendants
 * Godslayers
 * Sky Reavers
 * Tempest Reavers
 * Warriors of Peace (After the Fifth Ruin)
 * Alabaster Order (Until the Fifth Ruin)

Mechanicum Forces

 * Zhao-Arkkad
 * Stygies VIII
 * Artemia Majoris
 * Gryphonne IV
 * Triplex Phall
 * Cahonides
 * Xei'An
 * Crenevus
 * Pallas
 * Metenyarrl
 * Keneyaan
 * Quwal
 * M'Pandex

Knight Houses

 * House Kaigan
 * House Tyrinth
 * House Angeal
 * House Griffith
 * House Vyronii
 * House Cadmus

Titan Legios

 * Legio Gryphonicus
 * Legio Astraman
 * Legio Pallidus Mor
 * Legio Vindictus
 * Legio Xestobiax
 * Legio Solachra
 * Legio Illustratum

Cybernetica Cohorts

 * Tenshin-094 Hunters
 * Alpha-Beta-Gamma Troop

Army & Militia

 * Vasalius Terra Heredes
 * Zayth Regiments
 * Cagean Drop Troops
 * Tanith Ten-Thousand
 * Seran Seraphim Corp
 * Rhinean Devils Grav Troops
 * Houndskulls of Zetrabos
 * Iron-hide Hussars of Haurus
 * Geno Seven-Six Spartocid

Solar Auxilia Cohorts

 * 372nd Cohort, Camiramar Orbital Drop Marines
 * 416th Cohort, Kallastin Ogryn Auxilia
 * 914th Cohort, Ramien Celestials

Legion Serf and Planetary Defence Forces

 * Molnimian Re-educational Militia
 * Laogain Correctional Force
 * Cenobites of Ganden
 * Zbruch Domobrana
 * Rada Stráže