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As a hub of Imperial manufacturing and activity in the sector, the Tau were quick to assault Nimbosa during their Second Phase of Expansion. One of the battles was famous Koloth Gorge Massacre where Tau Commander Brightsword so mercifully order to kill all of the human warriors, that later he was summoned back to T'au to answer for this cruel act. Though the Tau captured the world initially from Vostroyan Firstborn Imperial Guard, it was retaken by the Black Templars during the Nimbosa Crusade.
- 1: Cities of Death, pgs. 56-57
- 2: Codex: Tau Empire (7th Edition), pg. 41, Relentless Expansion - The Nimbosa Annexation