Cyber-Empire

The Cyber-Empire, (COMIC: The Bidding War, AUDIO: Last of the Cybermen) also known as the Cyber Empire, (COMIC: The Cyber Empire) or Cyberman Empire, (PROSE: Doctor Who and the Cybermen. COMIC: Deathworld, COMIC: Assimilation²) was the interstellar empire of the Cybermen, (COMIC: Junk-Yard Demon) described by Jack Harkness as an "empire of evil". (TV: Fugitive of the Judoon) At its height, the Cyber Empire was the most powerful force in the universe. (COMIC: The Cyber Empire)

20th century
The Second Doctor, John and Gillian encountered the Cyber Empire when it was led by a caped Cyber-Controller. By the Controller's demand, CyberMondans in Cyber-Hover-Craft kidnapped thousands of Earthmen to build a CyberCity in the Controller's honour. (COMIC: The Cyber Empire)

In December 1986, the CyberMondans' invasion of Earth resulted in the destruction of Mondas. (TV: The Tenth Planet)

21st century
Reeling from its defeat at the hands of the Ninth Doctor in March 2005, the post-Time War Nestene Consciousness considered allying with the "mighty empires" of the Cybermen and the Daleks in order to rid the universe of the Doctor, (PROSE: Revenge of the Nestene) a prospect which would be realised with the Alliance. (TV: The Pandorica Opens)

On 15 October 2070, Cybermen from Telos attempted to destroy the Earth in order to eliminate humanity, whom they saw as a potential threat to the Cyberman Empire, as thus gaining retribution for the destruction of Mondas. However, this attack was thwarted by the Second Doctor. (PROSE: Doctor Who and the Cybermen, TV: The Moonbase)

Later history
A Cyber-Controller who crossed into the 24th century of the Federation universe planned to build a new Cyberman Empire using the resources of the Borg Collective, only to be defeated by the Eleventh Doctor and the crew of the USS Enterprise-D. (COMIC: Assimilation²)

Cybernaut Zogron was considered by one Cyberman to be one of the pioneers of the Cybermen's interstellar empire. (COMIC: Junk-Yard Demon)

To the Ninth Doctor's recollection, the Cyber-Empire annexed Malleon in the early 54th century, in either the 5300s or 5310s. (COMIC: The Bidding War)

had an outstanding death warrant in the Cyber-Empire. (AUDIO: The Bekdel Test)

Ice Warriors once encountered Cybermen of the Cyberman Empire on Yama-10. (COMIC: Deathworld)

The Cyber-Empire also operated on New Mondas, where they were defeated by the Daleks. (COMIC: Cyber Crisis)

The Cybermen of Telos were part of the Cyber-Empire during the Great Cyber War. At the time of the Cybermen's defeat, the Super Controller was linked to every piece of technology in the Cyber-Empire. (AUDIO: Last of the Cybermen)

Originally human, Ashad willingly joined the Cyber-Empire. (TV: Ascension of the Cybermen) As observed by Captain Jack Harkness, the Cyber-Empire was ultimately brought to "ruins", having finally been "brought down to nothing". However, the risk of the Cybermen returning remained. In the 21st century, Jack told Graham O'Brien, Yasmin Khan and Ryan Sinclair that the Alliance sent something back through time and space to defeat the Cybermen as he gave the companions a warning for the Thirteenth Doctor regarding the Lone Cyberman and the Empire. (TV: Fugitive of the Judoon) However, while the Cyber-Empire had been defeated in the Great Cyber-Wars of the far future, humanity was brought to the brink of extinction as well, hunted by surviving Cybermen. (TV: Ascension of the Cybermen)

After retrieving the Cyberium from 1816, (TV: The Haunting of Villa Diodati) Ashad plotted to restore the Cyber-Empire using an army of hundreds of thousands of Cyber-Warriors aboard a Cybercarrier recovered from the remains of a battlefield from the war with the intention of upgrading the Cybermen to be fully robotic and then unleashing the death particle to wipe out all organic life in the universe. Allying himself with, Ashad was ultimately betrayed and killed by the Master to take the Cyberium for himself. Ashad's plot was subsequently foiled when the Doctor, her companions and the human survivors of the Cyber-Wars destroyed the carrier with explosives, taking with it the entire Cyber-Army onboard. The Master's plot to forge a new race of CyberMasters was thwarted when Ko Sharmus sacrificed himself to detonate the death particle on Gallifrey, wiping out all organic life on the planet, presumably including the Master and his army. (TV: Ascension of the Cybermen, The Timeless Children)