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Black Reach (possibly Blackreach) is a large Hive World located in the south of the Ultima Segmentum, not far from the planetary realm of Ultramar and the Ultramarines homeworld of Macragge.[Needs Citation]
It is probably best known for the incident known as the Assault on Black Reach in 855.M41, in which Waaagh! Zanzag descended on the planet and was eventually defeated by the Ultramarines' 2nd Company, under Captain Cato Sicarius.
- 1: Warhammer 40,000 5th Edition Rulebook, [Needs Citation]
- 2: Codex: Space Marines (5th Edition), pgs. 36–37, 40