10th Chapter (Ultramarines Legion)
The 10th Chapter of the Ultramarines Legion is known to have been active during the Great Crusade and Horus Heresy.[1]
History
The 10th Chapter was operating at the Eastern Fringe by 007.M31, far away from other Imperial forces. Accordingly, it was not able to join the Calth Muster and did not take part in the Battle of Calth, becoming one of the so-called "unmarked" Ultramarines formations.[1]
Following the Shadow Crusade, Roboute Guilliman sent the 10th Chapter under Arceas Odinathus, alongside additional forces, to the northern regions of Ultima Segmentum. There they fought various Traitor and third-party contingents.[2b] In the late Horus Heresy, Odinathus rallied various loyalist contingents across the Dominion of Storms in the northeastern Galaxy to retake the important world of Honourum.[2a]
Known Actions
- 007.M31: Operations at the Eastern Fringe[1]
- ???.M31: Destruction of World Eaters garrison of Taur[2b]
- ???.M31: Destruction of Word Bearers garrison of Caith Laes[2b]
- 011.M31: Battle of Desperation[2b]
- 013.M31: Battle of Honourum[2a]
