The Saurons are a race of specially bred soldiers, warrior-eugenicists, whose genetic science is far beyond the Empire's. Sauron Soldiers are to elite human troops what those elite troops are to civilians. Beyond even the Soldiers lies the Saurons' greatest triumph and greatest weapon, the Cyborgs.
Genetically and chemically enhanced, the Cyborgs are living machines of human/Sauron origin and superhuman capabilities. With a genetic code based on synthesized RNA, they often breed true. Their own society holds them in awe, and barely in check. Ultimately the Cyborgs have come to dominate their own people — which we must hope will be their doom.