For daring to unite against the omnipotent power of Doctor Doom the heroes on Battleworld have been annihilated for their defiance. Seeing the..more..
Though they were allied with Captain America's faction, the X-Men chose to act as a "third force" in the conflict.
A sequel: Secret Wars II was published, with the Beyonder visiting Earth and having a tie-in with almost every Marvel comic book written at the time.
As revealed in 2015's Deadpool's Secret Secret Wars, Deadpool originally took part in this event, though after a failed romance with Wasp, she wished to forget him so strongly, everyone present did as well. However, he in turn wished for Zsaji's revival, and sent her back to her homeworld.
Secret Wars was Marvel's first company-wide crossover, and they were the first company to create a crossover that included all company properties in the history of comics.
The idea of Secret Wars was developed at the request of toy manufacturer Mattel, who were creating a new line of toys for popular Marvel characters. The company asked for an editorial concept to be published that tied-in with the new toy line and brought all the characters together.