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[[Image:Geno25.jpg|thumb|right|450px|Warriors of {{PAGENAME}} bow before a member of the [[Alpha Legion]] ]]

The '''Geno Five-Two Chiliad''' was a regiment of the [[Imperial Army]] raised on [[Terra]], one of the [[Old Hundred]], those Terran military formations that the [[Emperor]] allowed to continue past [[Unification]] and on into the [[Great Crusade]]. One of the oldest and most respected regiments in the Imperial Army, the Geno Five-Two Chiliad seemingly met its ultimate fate on the world of [[42 Hydra Tertius]], a few years before the beginning of the [[Horus Heresy]]. Known for being produced via genetic selection, the standard soldiers of Five-Two Chiliad were at the very peak of what standard humans could achieve physically. Whilst officers were generally weak and female, possessing [[Psychic]] abilities. This process of genetic selection later helped inspire the creation of the superhuman [[Thunder Warriors]].{{Fn|1}}