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Targetdrone.gif This article is about the Space Marine Chapter. For other uses of Nemesis, see Nemesis (disambiguation).
Nemesis SMC.jpg Unknown.jpg
Founding Chapter: Ultramarines[1]
Founding: Second Founding[1]
Chapter Master: not stated
Homeworld: not stated
Fortress-Monastery: not stated
Colours: Green with golden aquila. Pauldron trim showing company. [7]
Specialty: Exterminatus Operations[4c]
Strength: not stated
Battle Cry not stated

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]


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, and had a large Terran contingent - this resulted in a culture which Guilliman considered 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.[4c]

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's 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]

The Nemesis was only partially mustered at Calth as some of its companies were engaged alongside elements of the 7th Chapter reducing the Fra'al crucible worlds along the galactic rim.[4b] Those companies able to make the journey to Calth were mustered in the highlands of Thracius in order to distance them from population centres.[4c] The Chapter proved crucial in ultimately turning the tide for the Ultramarines when the Word Bearers revealed their betrayal. However, the Battle of Calth and the following Underground War greatly impacted many Nemesis members on a mental level, turning the already dour chapter even more stoic and grim.[8]

Known Engagements

As Ultramarines 22nd "Nemesis" Chapter

As Nemesis

Notable Elements

Chapter Fleet

Known units

As Ultramarines 22nd "Nemesis" Chapter:

Notable Members

As Ultramarines 22nd "Nemesis" Chapter:

See also