Twelfth Cyber Legion

The Twelfth Cyber Legion was a Cyberman fleet that monitored their local galactic quadrant. It was positioned twenty thousand light years away from Demons Run when part of the fleet was destroyed by the Eleventh Doctor, just to make a point to the Church's Anglican Regiment and the Cybermen. Rory Williams went to a Cyber Ship to learn the location of Demons Run from the Cybermen. (DW: A Good Man Goes to War)

It is not known if these are Mondasian Cybermen, Cybus Cybermen from the parallel universe, or the result of a merger between the two Cybers.