The Twelfth Cyber Legion was destroyed by the Eleventh Doctor, to make a point to the captors of his companion Amy Pond and her baby daughter, Melody, before he invaded the asteroid station Demons Run. (TV: A Good Man Goes to War)
Fragments of these fleets were encountered by the Eleventh Doctor during his travels. One crashed ship was found in the Arctic at a GSO excavation site in 2010, (GAME: Blood of the Cybermen) another under a shopping centre in Colchester in 2011, (TV: Closing Time) and a third in the village of Klimtenburg during the 19th century, (PROSE: Plague of the Cybermen) all three of which had crashed centuries prior to their discovery.
The suits of a Cyberman from the Cyber Legions, as well as two Cybermen from a parallel universe, were recovered after the Cyber-Wars and became part of Webley's collection at Hedgewick's World of Wonders. (TV: Nightmare in Silver)