The Sanguinary Brotherhood are Space Marine Chapters, that are descended from the Primarch Sanguinius.
Also known as the Sons of Sanguinius, they keep a firmly united counsel and convene in conclaves during matters of grave import from time to time. In such conclaves, it is typical that all present defer to the Commander of the Blood Angels although, over the course of the 10,000 years since the end of the Horus Heresy, there have been occasions when the voice of another is considered senior. One such case was when the newly-appointed Commander Kalael succumbed to the Black Rage in M35 and it was decided that the Chapter Masters from the Angels Sanguine and the Angels Vermillion would jointly take up the mantle of seniority, in order for the Chapters to show a united front against the various threats imperiling the Imperium at that time. Under their leadership, the Sons of Sanguinius faced Waaagh! Vangrod, the Chaos incursion of Silas Gorehand and the latter phase of the Nova Terra Interregnum.
- Unforgiven — A collection of Chapters from the bloodline of Lion El'Jonson
- 1: Codex Supplement: Blood Angels (9th Edition), pg. 31 — Successor Chapters
- 2: White Dwarf 45 (2014), pg. 29