Traitors

Brought together for different reasons, some for personal gain, others to right wrongs from the Imperium, the Traitors would prove to be the most insidious threat to the Imperium. Hailing from most of the military institutions of the Imperium of Mankind - and even some civilian militia - these forces would take on the Loyalists and Separatists throughout the Ruins.

Legiones Astartes

 * Black Stars
 * Red Eyes
 * Shadow Warriors
 * The Riven
 * Alabaster Order

Mechanicum Forces

 * Aehiri
 * Antire
 * Ur-Gamma
 * Ulan Hûda
 * Myrkrvellir
 * Genaan
 * Syedanoom
 * Heledrak
 * Illyrius
 * Aughlyicharar
 * Xana II
 * Tigrus
 * Urdesh
 * Sarum
 * Incaladion
 * Metalica
 * Cyclothrathe

Knight Houses

 * House Caraxes
 * House Fioranti
 * House Franze
 * House Malinax
 * House Procon Vi
 * House Atrax
 * House Mordred
 * House Ærthegn

Titan Legios

 * Legio Solaria
 * Legio Interfector
 * Legio Reavas
 * Legio Apollona
 * Legio Vindictus
 * Legio Xestobiax
 * Legio Magna
 * Legio Mortis
 * Legio Kydianos
 * Legio Vulturum
 * Legio Fureans
 * Legio Gotrith
 * Legio Vextrix
 * Legio Damicium
 * Legio Laniaskara
 * Legio Kulisaetai
 * Legio Tritonis
 * Legio Metalica

Army & Militia

 * Welvan Scorchers
 * Aumet Revolutionary Army
 * Skandrian Auxilia
 * Soldatos of Andolyn
 * Akaan’adiike
 * Skiirad Cohort
 * Selucid Thorakite

Solar Auxilia Cohorts

 * 163rd Cohort, the Cthonian Basilisks
 * 297th Cohort, the Storm Spears
 * 319th-321st Cohorts, the Skandrian Hussars

Legion Serf and Planetary Defence Forces

 * Sanguinary Host