High Quality Content by WIKIPEDIA articles! "The Fall of the Mutants" was a comic book crossover event by Marvel Comics spanning January to March 1988. It spanned three issues each of The Uncanny X-Men (issues #225–227), X-Factor (issues #24–26), and The New Mutants (issues #59–61); unlike most crossovers however, the various titles` storylines did not intertwine, but were instead linked thematically as each team underwent major ordeals and drastic changes in their status quo.