X-Force is a fictional Marvel Comics

Marvel Comics

Marvel Worldwide, Inc., commonly referred to as Marvel Comics and formerly Marvel Publishing, Inc. and Marvel Comics Group, is an American company that publishes comic books and related media...

 superhero

Superhero

A superhero is a type of stock character, possessing "extraordinary or superhuman powers", dedicated to protecting the public. Since the debut of the prototypical superhero Superman in 1938, stories of superheroes — ranging from brief episodic adventures to continuing years-long sagas —...

 team, one of several spin-off

Spin-off (media)

In media, a spin-off is a radio program, television program, video game, or any narrative work, derived from one or more already existing works, that focuses, in particular, in more detail on one aspect of that original work...

s of the popular X-Men

X-Men

The X-Men are a superhero team in the . They were created by writer Stan Lee and artist Jack Kirby, and first appeared in The X-Men #1...

 franchise. Conceived by writer/illustrator Rob Liefeld

Rob Liefeld

Rob Liefeld is an American comic book writer, illustrator, and publisher. A prominent artist in the 1990s, he has since become a controversial figure in the medium....

, the team was formed in New Mutants, vol. 1 #100 (April 1991

1991 in comics

-January:* Checkmate is canceled by DC Comics with issue #33.* El Diablo vol. 2 is canceled by DC with issue #16.* Count Duckula is canceled by the Marvel Comics imprint Star Comics with issue #15....

) and soon afterwards was featured in its own series.

The group was a new incarnation of the 1980s team, the New Mutants. Led by the mutant

Mutant (Marvel Comics)

In comic books published by Marvel Comics, a mutant is an organism who possesses a genetic trait called an X-gene that allows the mutant to naturally develop superhuman powers and abilities...

 Cable

Cable (comics)

Cable is a fictional character appearing in comic books published by Marvel Comics. The character first appeared as an infant in Uncanny X-Men #201...

, X-Force was more militant

Militant

The word militant, which is both an adjective and a noun, usually is used to mean vigorously active, combative and aggressive, especially in support of a cause, as in 'militant reformers'. It comes from the 15th century Latin "militare" meaning "to serve as a soldier"...

 and aggressive than the X-Men.