Schooled in the forbidden knowledge of the Omnissiah, Techmarines are individuals that displayed an affinity for the operation of machines as Aspirants. They undergo special trials and tests after their induction into their parent Chapter to discern their suitability to receive additional training under the auspices of the Adeptus Mechanicus. Upon their ascension to the status of a full Battle-Brother, those judged worthy are despatched to a Forge World of the Adeptus Mechanicus -- perhaps even to Mars itself, where they are inducted into the secrets of the Machine Cult. Upon their eventual return to their Chapter, the Space Marine has learned not only the operation of all manner of machinery, but also how to convene with the Machine Spirits themselves, how to undertake repairs of aggrieve