X-Men (Earth-339)

Foundation
Charles Xavier brought Scott Summers, Jean Grey, Hank McCoy, Warren Worthington III and Bobby Drake together to form the X-Men. He wanted the team to help save humanity from threats and to give mutants a good name.

Brotherhood of Mutants
The X-Men's first clash was with Magneto and his brotherhood, consisting of Quicksilver, Scarlet Witch, Toad and Mastermind. The X-Men were able to defeat Magneto and his team.

Rise of Apocalypse
When Apocalypse rose and conquered Egypt, the X-Men fought alongside the humans to stop him. They saved Ororo Monroe and Samara Prince from being killed by Apocalypse. They became Storm and Ishtar and new members of the team.

Fall of San Francisco
The X-Men were attacked by Magneto and his brotherhood again. However it appeared Magneto had joint Apocalypse. He was strengthened by Azazel, Kabal Brashir and Decimus Furius. They managed to capture the X-Men. However Azazel killed Charles Xavier. Magneto was furious about the murder of his old friend and betrayed the Clan by attacking Azazel. Azazel then stabbed Magneto and left him for dead, Quicksilver and Scarlet Witch then fled. Azazel brought the X-Men, Toad and Mastermind to Apocalypse in Egypt. There Toad and Mastermind recieved membership into Clan Akkaba.

Reformation of the X-Men
Magneto survived Azazel's attack and searched for Quicksilver ans Scarlet Witch. After they left the Avengers Magneto asked them to rejoin him, but now as members of the X-Men. They joined him and so did Cannonball. Although he still wanted a world for Mutants, he did not want one ruled by Apocalypse, because he killed mutants too. He searched for other mutants, Wolverine and Psylocke and he recruited the mercenary Deadpool and reformed them as the X-Men.

Death of Humanity
Apocalypse, Ichisumi, Omega, Sinister, Sugar Man and the High Evolutionary managed to create a gas that killed all men on Earth. However mutants were resistant. They released it and almost all men on earth died. Magneto now knew how he could fight back. He could overthrow Apocalypse and have the mutants live in peace. Magik was revealed to be alive and joint the X-Men. Magneto joint forces with the New Brotherhood consisting of Mystique, Sabretooth, Rogue, Destiny and Blob. Together they fought against Apocalypse.

Rise of Hell
However a new and greater problem arose. Mephisto had gained so many souls that he was now powerful enough to rise against the surface world and he did. He sent a giant army of millions of demons onto earth. Apocalypse, Magneto and Mystique joint force to fight back. Many mutants were killed very swiftly including Psylocke, Colossus, Rogue, Blob and Destiny. Magik and Ishtar were then sent in as sleeper agents because they were part demon.

The Rise of Archangel
Archangel then came up with an idea. If Apocalypse were to die, he could succeed him and use the Death seed to make himself and his allies close to immortal. However he needed to slay Apocalypse in way that could not come back to haunt him. Havok told the other members of Clan Akkaba that they should join the X-Men instead of using the disfunctional Clan. Cyclops called him treasonous and told Archangel. Archangel told Cyclops that he agreed with Havok. Cyclops then informed Pestilence, who informed Apocalypse abou the treason of both Archangel and Havok. Apocalypse then called the entire Clan together, ready to demonstrate his power by killing Archangel and Havok. However Archangel had informed the X-Men. Apocalypse asked his Clan who wanted to leave. Havok proudly stood up and told Apocalypse that he did not want to serve such a cruel leader. Archangel then called upon the X-Men. The X-Men fought only Apocalypse and those that attacked them. Selene, Emma Frost and Sebastian Shaw understood that the X-Men were winning and joint them. Archangel then killed Decimus Furius, Mikhail Rasputin and Ozymandias. Apocalypse was severely weakened by Magneto and Archangel and was now unable to keep his hold on Storm. Storm then betrayed Apocalypse too, but was killed by Cyclops. Cyclops had gone insane and started attacking his brother with Azazel's dagger. Mephisto then launched a second assault on Earth. This time he was supported by Loki, King of Asgard. Loki killed Apocalypse using the axe Jarnbjorn. Archangel, Magneto and the X-Men then retreated. Scarlet Witch, Iceman and Mystique were killed during the retreat.

Ascension of Archangel
Archangel then took over Apocalypse his position and was infused with the full power of the Death Seed. He chose as his Horsemen: Magneto, Havok, Selene and Perfection. He killed Sebastian Shaw and Shadow King, seeing them as a potential threat. Cyclops was now the only non-horseman member of the Clan. Archangel and the X-Men then launched a counterassault against Mephisto. In this assault all those not infused with the Death Seed died, meaning Cyclops, Quicksilver, Cannonball and Sabretooth.