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'''Omon''' is an oceanic city on the world [[Jhanna]]. It rebelled against the [[Imperium]] under the oppression of [[Chaos Space Marines]] and other renegades and was recaptured by two [[Space Marine Company|companies]] of [[Ultramarines]] during the [[Purgation of Jhanna]]. These companies were led by [[Marneus Calgar]] in 807.[[M41]].{{Fn|1}}

==SourceSources==*{{Endn|1}}: [[Codex: Space Marines (3rd Edition)]], {{Cite This}}