Preacher-Cyberman War

On an alternate Earth, the Preacher-Cyberman War was a major war by the Preachers against the Cybermen. Created by John Lumic, CEO of Cybus Industries, the Cybermen sought to upgrade all of humanity into their kind. (TV: Rise of the Cybermen / The Age of Steel) The conflict covered the entire globe, (GAME: Cyber Assault) and even spread into the Doctor's universe. (TV: Doomsday)

Rise of the Cybermen
The conflict began in People's Republic of Great Britain when John Lumic sent a vanguard of newly-converted Cybermen to storm Pete Tyler's house, where a birthday party for his wife Jackie was being held with the President of Great Britain attending. The Cybermen killed him and began rounding up the guests for conversion, killing any who resisted. The Tenth Doctor and Rose Tyler escaped the party with Pete and were rescued by the Preachers who had arrived on the scene, along with Mickey Smith. The Cybermen surrounded them before they could escape, (TV: Rise of the Cybermen) however the Doctor was able to use a crystal from his TARDIS to destroy them.

As the Preachers retreated, Lumic activated the EarPods of every citizen in London, comeplling them to march to Battersea Cyber-factory for conversion. The Doctor organised the Preachers to infiltrate the factory by three methods; himself and Miss Moore via the tunnels, Rose and Pete with the marchers wearing fake ear pods and Mickey and Jake via the roof. The Doctor and Miss Moore were caught, with her being deleted, and brought before Lumic now upgraded into the Cyber-Controller, along with Rose and Pete who had been quickly caught. Meanwhile Mickey and Jake disabled the earpod transmitter aboard a hovering airship, freeing the marchers who fled the factory in a mass panic. Knowing Mickey was watching via the security cameras, the Doctor discretely guided him into finding the code to deactivate the Cybermen's emotional inhibitors and send it to Rose's phone. The Doctor then connected the phone to the factory's, shutting down the Cybermen's inhibitors and sending them mad. With the mad Cybermen exploding, the Doctor, Rose and Pete fled to the roof and reached Mickey and Jake's airship.

Though the cyber factory in Britain had been destroyed, more existed across the globe. Whilst the Doctor and Rose returned to their universe in the TARDIS, Mickey and Jake resolved to continue to fight against the Cybermen. (TV: The Age of Steel)

Global warfare
The conflict spread across the globe, (GAME: Cyber Assault) with Paris being the centre of a battle. (GAME: Save Paris) The Preachers eventually succeeded in sealing the Cybermen inside their factories. (Cyber Assault) The Cybermen numbered 5 million by this point. A debate raged on what should be done with the Cybermen, with some arguing that they had rights as former humans. (TV: Doomsday)

Crossing universes
During this time the Cybermen infiltrated Torchwood and used their experiments with a breach in reality to map themselves onto Earth of the Doctor's universe, seemingly disappeared.

Three years later, after the People's Republic had discovered Torchwood's actions and taken control of the institute, the Preachers developed technology to cross the breach and follow the Cybermen. Mickey went first and infiltrated the Torchwood Institute. (TV: Doomsday) After the Cybermen arrived in force around Earth, Mickey witnessed the opening of the Void Ship, (TV: Army of Ghosts) unleashing the Cult of Skaro. As tensions between the Daleks and Cybermen escalated, more Preachers led by Jake arrived in Torchwood Tower, in time to rescue the Doctor and destroy Cyber-Leader One. The Preachers became embroiled in the Battle of Canary Wharf, even briefly fighting alongside Cybermen against the Cult, until the Doctor had them retreat across the breach so he could open it fully on his universe's side to send the Cybermen and Daleks into the Void. His plan was successful, finally wiping out the Cybermen. (TV: Doomsday)