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The Nemesis Space Marine Chapter are a Second Founding chapter descended from the Ultramarines.[1] They are not found in the Apocrypha of Davio.[2]

Marine Basic Data Chapter Symbol
Nemesis SMC.jpg
- Nemesis -
Founding Chapter: Ultramarines[1]
Founding: Second Founding[1]
Chapter Master: Unknown
Homeworld: Unknown
Fortress-Monastery: Unknown
Colours: Green
Specialty: Exterminatus operations
Strength: Unknown
Battle Cry: Unknown


During the Great Crusade and Horus Heresy, the 22nd Chapter of the Ultramarines Legion was known as the Nemesis Chapter, specialising in Exterminatus operations.[4c] The 22nd was a patchwork of specialised units, most notably maintaining two full companies of the Destroyer squads rarely found in the other Chapters,[5b] and had a large Terran contingent - resulting in a culture which Guilliman considered to too far removed from the rest of the Legion.[5b]

The Chapter earned their name during the purgation of abhuman corsairs in the Cancerai Nebula alongside the VIII Legion. As well as the name "Nemesis", they took to wearing black gauntlets, midnight blue helms and adopted the weighing scales and death's head icon of judgement.[4b]

Guilliman viewed the Destroyers as an unpleasant necessity, keeping them off the front lines where possible and expressing an intent to restructure the dedicated Destroyer companies of the Nemesis.[5a] During the campaign against the orks of the Thoas Empire, he kept the Destroyer companies in the void, hunting the orks on the barren moon of Agrigentum V. In the wake of Chapter Master Phalaris' death, Guilliman appointed Eleon Iasus, Captain of the 166th Company, as his replacement as part of an effort to integrate Nemesis into the wider culture of the Legion.[5b] The Destroyer companies were eventually deployed from reserve in the final stages of the Battle of Thoas.[5c]

Known Engagements

As Ultramarines 22nd "Nemesis" Chapter

As Nemesis

Notable Elements

Notable Members

Ultramarines 22nd "Nemesis" Chapter

Chapter Fleet

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