Alien Legion is a thirty-eight-issue American science fiction comic book series, with several associated titles, created by Carl Potts, Alan Zelenetz, and Frank Cirocco for Marvel Comics' Epic Comics imprint in 1983. It features a military unit, Force Nomad, similar to the French Foreign Legion.

Within the Marvel Comics Multiverse, the Alien Legion Universe is designated as Earth-98140.

Alien Legion — cover-titled The Alien Legion for its first series and initial graphic novel — features Force Nomad, a military unit similar to the French Foreign Legion. Its characters include leader Sarigar, whose lower half is serpentine, the fully humanoid Torie Montroc, and Jugger Grimrod, an alien of the Thraxian race.

Carl Potts began developing the character designs and structure of Alien Legion as a sample of his artwork when he was attempting to break into the comics field. He chose to develop an original story and characters to stand out from the competition when submitting to editors.

The original concept was the 'Foreign Legion in space' and all the legionnaires were human. ... Then I created the humanoid/serpentine design that later became Sarigar and decided that the Legion should include a wide variety of species. This was in the early '70s. By the time I got around to developing the idea further in the early '80s, Star Wars obviously became an influence. The Alien Legion universe is a giant extrapolation of the American democratic melting-pot society where different races and cultures work together for the common good while dealing with the pluses and problems that the nation's diversity creates.

Potts returned to the concept in 1983 after joining Marvel Comics, and the series was pitched as a part of the Marvel Universe. Jim Shooter, then Editor-in-Chief of Marvel, approved the idea and Potts began development on the series under Marvel's contract which guaranteed profit participation for new characters. After Shooter withdrew his permission for the series, Archie Goodwin extended an offer to launch Alien Legion under the Epic Comics imprint.

Potts and co-creators Alan Zelenetz (writer) and Frank Cirocco (penciler) completed development of series, and the franchise debuted with Marvel/Epic Comics' The Alien Legion #1-20 (cover-dated April 1984 - June 1987). The 18-issue Alien Legion (Oct. 1987 - Aug. 1990), minus "The", followed, generally scripted by Chuck Dixon and penciled by Larry Stroman. Afterward came the three-issue Dixon-Stroman miniseries Alien Legion: On The Edge (Nov. 1990 - Jan. 1991); the two-issue Dixon-Stroman Alien Legion: Tenants of Hell (1991); the one-shot cover-titled Alien Legion: Grimrod and copyrighted Alien Legion: Jugger Grimrod (Aug. 1992), by Dixon and artist Mike McMahon; the single-issue Alien Legion: Binary Deep (Sept. 1993), by Dixon and Argentine artist Enrique Alcatena; and the three-issue miniseries Alien Legion: One Planet at a Time (April–July 1993), by Dixon and penciler Hoang Nguyen.

Additionally, Marvel/Epic published two spin-offs: Marvel Graphic Novel #25 (cover-titled Marvel Graphic Novel: The Alien Legion), released in 1986 and containing the story "A Grey Day To Die" by writers Potts and Zelenetz, penciler Cirocco, and the first series' regular inker, Terry Austin; and the one-shot crossover with another series Law Dog and Grimrod: Terror at the Crossroads (1993).