Magneto once worked alongside Professor Charles Xavier to construct a sanctuary in the forgotten jungles of the Savage Land, a refuge for anyone seeking respite from the kind of persecution mutants face. For a while, the two worked in harmony -- but the partnership began to dissolve as Magneto became increasingly hateful toward mankind. He came to believe Homo superior represented the next step in human evolution, and that Homo sapiens should live under the rule of mutants. Xavier did not share Magneto's view.
Ultimately, the two men engaged in a fierce battle that ended when Magneto paralyzed Xavier from the waist down -- with a metal spear through the back. His adversary out of the picture, Magneto made open anti-human attacks on both Washington and New York. The U.S. government responded by launching the Sentinels -- giant, murderous robots programmed to halt the mutant threat by any means necessary. Unshaken in his plans to subjugate the human race, Magneto believes only one force to be a true threat to his cause: Xavier's X-Men.
When Xavier managed to escape and returned to the United States, he established his "School for Gifted Children" -- using his ancestral mansion as a secret base to train young mutants to use their powers for humanity's benefit. During the months that followed, Xavier assembled his team of "X-Men" -- Storm, Colossus, Beast and his first two students: Cyclops and Marvel Girl.
The White House has constructed these weapons to go after the mutant threat - the leader being Magneto, who’s attacks and threats to replace the human race have caused NASA scientist, Bolivar Trask, to build these machines. The government figures that they can round up every mutant within the United States within the next two months.
