From Lexicanum

A Traitor Chapter mentioned in Soul Drinker and Daemon World. They have a reputation as madmen.²

Chapter Summary

Marine	Basic Data	Chapter Symbol Miniature
	Name: Thunder Barons Founding chapter: Unknown Founding: Unknown Chapter Master: Unknown Homeworld: Unknown Fortress-Monastery: Unknown Main colours: Unknown Specialty: Unknown Battle Cry: Unknown Estimated strength: Unknown

Sources

• ¹:Soul Drinker (Novel) by Ben Counter
• ²:Daemon World (Novel) by Ben Counter

See also

• List of Space Marine Chapters
• Renegade chapters