|Founding||Probably the 3rd|
|Colours||Dark Green and White Quartered with gold aquila|
A Space Marine Chapter who were made from the Novamarines, not much is known about them aside from the fact that many of it's victories have been against dire odds and they seem to be bros with the Dark Hunters. They are described as being very prideful and egotistical and also known for pissing off other imperial organizations with their attitude. Judging by their origin, they probably have similar tactics to the Novamarines and suffer from the same genetic curse that leads them to hate the Xenos more than ususal.
As of the opening of the Great Rift, their homeworld of Darkhold has found itself under siege, but relief forces of the Iron Hands and Star Dragons are expected to arrive from the nearby worlds of Draconith and Medusa.
- Achilus Crusade - Also known as the Jericho Reach Crusade. The Dark Sons Captain, Tauros Demos, competed with the the Storm Wardens commander for overall command of the Space Marines contingent. Demos won the duel, but was so impressed by the honour and prowess of the Storm Warden, that he decided to surrender command to him.
- First Punisher War - The Dark Hunters are getting their asses kicked in their homeworld of Phobian by a Chaos warband known as the Punishers, who keep spamming waves of cultists from the safety of their Emperor-class Battleships. The Dark Sons, along with five other chapters arrive just in time to save the day.
- Second Punisher War - :Electric Bogaloo. The Dark sons save the asses of the Dark Hunters by reinforcing one the Chapter's companies when it got itself outmatched by the Punishers... again. This time though, a captain of the Dark Hunters allied with some Eldar and didn't kill them afterwards, thus commiting an act of Heresy.