X-Men: Legacy is a Marvel Comics series featuring the eponymous group of mutant superhero.
The title began its publication in October 1991 as X-Men. From 2001 until 2004 it was published as New X-Men. It had reverted (as of issue #157) to its original title, but changed again (from issue #208) to X-Men: Legacy. It is usually referred to as "X-Men Volume 2" because the first series, currently Uncanny X-Men, was titled The X-Men prior to 1981.
X-Men is the second monthly series to portray the adventures of the mutant team. Colloquially, it is sometimes known as "Adjectiveless X-Men", in comparison to Uncanny X-Men, Astonishing X-Men, and other X-Men series that have modifiers.
When the book launched in 1991, it focused on a squad led by Cyclops. Over the next several years, the two-squad format faded, and the book's stories took place around those in Uncanny. The team divided again into two, then three squads in 2000, and has remained so since.
The book currently focuses on...
full article at wikipedia