Cyber-War (Earthshock)

A Cyber-War was anticipated in the year 2526.

History
In 2526, the general population had no knowledge of Cybermen, although various governments intended to sign a pact to unite against the Cyber-race. A force of Cybermen attempted to prevent the war. They tried to destroy the Earth, first with a Cyber-bomb and then by crashing a human freighter into the Earth to prevent the alliance who planned to fight them from forming, destroying the unity. In the words of the Cyber-Leader, it would have been a great psychological victory that was designed to destroy the general morale. Indeed, the Cybermen of this period regularly performed scientific study of human emotion. Both attempts to destroy the Earth were stopped by the Fifth Doctor, who claimed that the Cybermen could not possibly win the coming war. (TV: Earthshock) This event was recorded under Onslaught on Earth, one of the Cyber-Documents. (AUDIO: The Ultimate Cybermen) Having failed to destroy Earth while losing their Cyber-Leader, (TV: Earthshock) the main Cyber-Fleet dispersed. (TV: Time-Flight)

What happened to the fleet afterwards remained a mystery to the CyberHive, an attempt at chronicling the history of the Cybermen from the Cyber-Documents. ArcHivist Hegelia suggested that an agreement was reached to join forces against the Cybermen, resulting in a Cyber-War beginning in the solar system with a battle between the main Cyber-Fleet and human forces which extended to other parts of the galaxy before the Cybermen were ultimately overcome. From the document Departure from Telos, Hegelia found an account of the Cybermen's attempt to leave Telos, which the ArcHivist believed was in anticipation of a significant attack on the planet by galactic forces. (AUDIO: The Ultimate Cybermen) This attempt ended in failure as Telos' Cyber-Control was destroyed along with seemingly all Cybermen on the planet. (TV: Attack of the Cybermen, AUDIO: The Ultimate Cybermen)