3.14159 (Earth-1191) VS Aaron Stack (Earth-19121)

The Sentinel that would name itself 3.14159 was one of the Sentinels brought to Earth-616 by the time traveler Trevor Fitzroy of Earth-1191. As part of the "game" he was playing with the Upstarts, Fitzroy sent his Sentinels to murder the Reavers, and their leader Donald Pierce.[1] This Sentinel was severely damaged and shut down, and constantly doused in the bio-mechanical fluid that Pierce had used to create his cyborgs and androids. Later when Wolverine and Jubilee went to the Reavers headquarters to investigate on orders from Professor X they accidentally reactivated the Sentinel.[2] Having become sentient due to its exposure to the bio-mechanical fluid, it determined that it should act in the best interest of Sentinel kind and decided to wipe out all of humanity. Using a time warp to transport itself (along with Wolverine and Jubilee) to the Anthill, the base of the now deactivated Sentinels built by Larry Trask, it built a device that would cause a solar flare and eradicate all human life on the Earth.

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Machine Man's history is presumably similar to his Earth-616 counterpart's. When intelligent zombies called the Respawned invaded Earth, a S.H.I.E.L.D./A.I.M. coalition assembled a team of robots called the Ennows to fight the zombies as machines couldn't be zombified. Machine Man was one of the robots. However, after the population of humans fell to almost nothing, the Ennows were left to own devices and and began fighting for themselves against the zombies. When a group of human survivors were attacked by a horde of Respawned, the Ennows, including Machine Man, fought them off. A fight almost broke out between the survivors and the Ennows, but it was quickly broken up. The survivors were then taken into Ennow custody with Machine Man ordering them taken to the holding bays. The Ennows planned to turn the survivors into machines through exposure to the Transmode Virus. However, the process was interrupted by a group of zombies consisting of superhumans with superhuman strength that were able to break through the Ennows' home, the Phalanx Wall. Machine Man was ripped to pieces by the zombies.

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