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The Orkoid races are believed to have been genetically engineered millenia ago. Ork legend attributes their creation to the [[Brain Boyz]], a diminutive but extremely intelligent subspecies of Orkoid, who bred the Gretchin to be servants and the Orks to be warriors{{Fn|1a}}.  Later evidence establishes that the Ork races may have in fact been created by the [[Old Ones]], who are described as creating the ''Krork'' as part of a last-ditch attempt to fight off their enemies such as the [[Necrons]] and [[Enslavers]].{{Cite This}} The Orks have had a presence in the Galaxy since that time, and are known to have first battled [[mankind]] long before the foundation of the [[Imperium]], tens of thousands of years ago during the [[Dark Age of Technology]]. Humanity and the Orks have fought innumerable conflicts over this time and are unlikely to ever stop.{{Fn|5}}