Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
X.S.E. refers to a comic book series and two mutant organisations within the Marvel Universe:
Xavier's Security Enforcers, the militia created to police the mutant population in Bishop's future, and the series of the same name (usually abbreviated XSE).
Index of articles associated with the same name
This set index article includes a list of related items that share the same name (or similar names). If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.
Category: