Collecting the first year of Mark Millar's ground-breaking run of the X-Men in the Ultimate Universe! The world stands on the brink of genetic war. Mankind has made the first move, launching an army of giant, cybernetic executioners called Sentinels - programmed to target and eliminate the mutant DNA strand. Now, Magneto and his mutant terrorist cell are preparing to follow through on their threats of Homo sapien genocide. The only force that can prevent total annihilation: six awkward teenagers ...