As the Marvel Universe is ripped apart by the Civil War, the X-Men also find themselves crumbling from the inside out. Will they fold-up and admit defeat, or will the X-Men finally start to fight back?

Bishop and the X-Men are on a collision course! Both parties race to find the missing 198 first. It's X-Man against X-Man! Meanwhile, the O\N\E tightens its grip, but will their power slip away in the process?!

It's X-Man vs. X-Man! But who fired the first shot and why? Bishop and the X-Men battle for the 198! It's Civil War!

The final showdown that has threatened to break the foundation of the X-Men is here! It's Bishop vs. the X-Men. Meanwhile, the leader of O\N\E plots the demise of all mutants everywhere. Can Mutantkind survive their own Civil War?!

Enough is enough! The tension between the X-Men, the 198 and the O\N\E\* has finally reached a breaking point. As Civil War rips apart the Marvel Universe, the X-Men also find themselves crumbling from the inside out. Will they admit defeat, or will they finally start to fight back? Collects Civil War: X-Men #1-4.