|The X-Men are a fictional superhero team in the Marvel Comics Universe. In the series, Professor Xavier responds to anti-mutant prejudice by creating a haven at his Westchester mansion to train young mutants to use their powers for the benefit of humanity.|
The X-Men exist in the Marvel Universe with other characters portrayed in Marvel Comics series. As such, it is unsurprising that they often meet characters from other series, and the global nature of the mutant concept means the scale of stories can be highly varied. The X-Men fight everything ranging from mutant criminals to galactic threats.