Origin of Generation X: Tales of the Phalanx Covenant
Scott Lobdell, Fabian Nicieza, Larry Hama, and Todd DeZago (Writers); Joe Madureira, Andy Kubert, Adam Kubert, Steve Skroce, Jan Duursema, Roger Cruz, Tony Daniel, Ken Lashley, and Steve Epting (Artists)
In the dark recesses of the Galaxy waits an alien race. More machine than organic, they seek out inferior races which they can assimilate. They are called the Phalanx, and they have just targeted Earth as their next meal. Through means of assimilation, subterfuge, and incursion, the Phalanx have prepared a preemptive strike against the X-Men. Armed with this knowledge, the mutants have launched a desperate strike of their own, to find seven fledgling mutants: Husk, Chamber, Skin, Jubilee, M, Synch and Blink -- all that stand between the Phalanx and victory.
Uncanny X-Men (1st series) #316-317, X-Men (2nd series) #36-37, X-Factor (1st series) #106, X-Force (1st series) #38, Excalibur (1st series) #82, Wolverine (2nd series) #85, Cable (2nd series) #16, Generation X #1