Abydion, the Fifth City
Once upon a time, the engineers of the distant past created mechanical servants for mankind, and it was good. However, as the years and centuries passed, these servants grew to resemble their masters more closely, until they could no longer be easily distinguished, while some true humans believed in the superiority of these False Men so strongly as to take pieces of them into their own bodies. But the False Men did not only converge upon the image of Man, they also diverged into blatant mockeries of that image.
Despite this, the False Men were valuable tools in the wars to defeat the Starwalkers and the Skinchangers, so numerous efforts were undertaken to regulate them and to ensure their continued service to humanity. Alas, such efforts invariably proved insufficient and they were finally outlawed en masse in AM 3700 and hunted to extinction.