Uncanny X-Men #271 (December 1990) by Marvel Comics
X-Tinction Agenda: Part 4 of 9. "Flashpoint!" Guest-starring X-Factor and the New Mutants. Story by Chris Claremont. Art and cover by Jim Lee and Scott Williams. Story continued from X-Factor #60. The nation of Genosha has declared war on the Children of the Atom! Warlock has already fallen. Storm, Boom-Boom, Wolfsbane, and Rictor have been enslaved. Now it's Wolverine's turn. But can even the feral X-Man save his friends when the true face of the leader of the campaign stands revealed? Plus, the X-Men are betrayed by one of their own.