X-Treme Sanctions Executive

The XSE was founded by Storm at the behest of the United Nations in order to police the growing mutant population. Though initially Storm acted alone, she soon signed up the other members of the X-Treme X-Men as officers, forming a legitimate mutant organization (though not the first, with the second X-Factor having been government-run). Though founded in the latter issues of the "X-Treme X-Men" comic book, the team's adventures have transferred to "Uncanny X-Men" following the return of writer Chris Claremont to that book. Claremont writes and Chris Bachalo currently illustrates the adventures of this team.

Though certain mutants (notably Shadowcat) are shown around the team, the main membership consisted of:

* Bishop - Lucas Bishop
* Cannonball - Sam Guthrie
* Marvel Girl - Rachel Summers
* Nightcrawler - Kurt Wagner
* Psylocke - Elisabeth Braddock
* Sage - Tessa
* Storm - Ororo Munroe
* Wolverine - Logan

Gambit and Rogue are also associated with XSE, although are seemingly not official members. A letters page claimed Magma was also a member of the team, but this has never been borne out by the actual stories.

After a confrontation with the Fury, Cannonball took a leave of absence to recuperate from his injuries. He then joined the newly reformed X-Force team, but has now returned to the X.S.E. team. Sage, meanwhile, has rejoined the Hellfire Club to keep an eye on Roberto da Costa (who has become the new Lord Imperial) to make sure he is not corrupted by power, like Sebastian Shaw. After the effects of M-day, Storm stayed in the African country of Niganda to help bring things back to normal.

Since M-Day, the team has largely ceased its activities as law enforcement concentrating on cleaning up the damage from the day and liaising with the US Governments O*N*E program.