The Sons of the Phoenix is a Loyalist Space Marine Chapter comprised entirely of Primaris Space Marines created from the lineage of the Imperial Fists and raised during the Ultima Founding of ca. 999.M41. Faithful to the Emperor and ritualistic in their battle cant, the Sons of the Phoenix pride themselves on plunging into the flames of battle.
They are constantly on crusade, which are led by their Chaplains. Their crusades are so impressive in spectacle they pave the way for the Imperial Creed to spread across the galaxy, and hence are followed by a great many holy men and women of the Adeptus Ministorum.
The Chapter's fleet was scattered by the opening of the Great Rift, and now the Sons of the Phoenix crusade to gather their forces back as one.
Sometime after their Founding, the Sons of the Phoenix were attacked by warbands of the Thousand Sons Traitor Legion from the Cult of Change. During these attacks several members of the Chapter were taken captive in order to be used as specimens in the Thousand Sons' arcane experiments.
- Wars of Antipathy (Unknown Date.M42) - Though the Sons of the Phoenix are a relatively new addition to the armies of the Emperor, during the Wars of Antipathy they won a reputation for levelling spectacular firestorms against the foe -- and for the fact that they would fight on through those flames without hesitation.
- War of Beasts (Unknown Date.M42) - The Sons of the Phoenix eagerly answered the call to aid the vitally important Imperial world of Vigilus. The presence of their 6 companies in Hyperia Hivesprawl had a galvanising effect on the Vigilant Guard and Adepta Sororitas who had long anticipated their coming.
The inset of the right pauldron is purple as is the right gauntlet and left knee plate.
Chapter markings and unit designations are gold.
The gold squad specialty symbol is displayed on the right pauldron, while the inset of the left pauldron is white and proudly displays the Chapter's iconography.
The company number is displayed as a golden Roman numeral on the left knee plate or placed in the centre of the squad specialty symbol on the right pauldron.
An additional, smaller specialty symbol is displayed next to the company number on the left knee plate, which designates a company's tactical specialty.
A Sons of the Phoenix Sergeant is designated by a white helm with a single red vertical stripe, while a Lieutenant is designated with a red helm.
Sons of the Phoenix Sergeants display squad numbers on their left pauldron.
The Sons of the Phoenix's Chapter badge is a stylised black helm to which a star of the same colour is adjacent. A stylised black wing protrudes from the helm's bottom as black electric lightning bolts rise from the top.
- Codex Chaos Space Marines - Thousand Sons (8th Edition), pg. 25
- Codex: Space Marines (8th Edition) (Revised Codex), pg. 35
- Imperium Nihilus: Vigilus Defiant (8th Edition), pg. 88
- White Dwarf (October 2017), "Eavy Metal - Create your own Chapter," pg. 117