There was a time when Marvel’s X-Force was one of its hottest properties. As drawn by Rob Liefeld, the book chronicled a group of hard-hitting mutants who believed in preemptive strikes against the bad mutants of the world, and likewise for not being so gentle and leaving them to walk away. The original line-up has gotten a lot of mileage at Marvel, with many of the characters appearing in various X-books since the team first premiered in 1991.
The Marvel Crossover House of M posited a world where the Scarlett Witch, temporarily insane, would first change the planet to one where mutants were in charge, and then after some stress changing everything back to a world where hardly any mutants still had their powers. Wolverine alone knew the changed world was wrong, because Marvel and writer Brian Michael Bendis seem incapable of doing a massive crossover storyline that doesn’t give Wolverine a major role, and he found a way to make the other heroes he needed remember with the help of a young girl named Layla Miller. Layla had the power to make people see the Scarlett Witch’s changes weren’t right.