Legion

Roman legion, the basic military unit of the ancient Roman army
Aviazione Legionaria, Italian air force during the Spanish Civil War
A legion is the regional unit of the Italian carabinieri
Spanish Legion, an elite military unit within the Spanish Army
Condor Legion, a unit of military personnel from the air force and army of Nazi Germany
French Foreign Legion, a part of the French Army, created for foreign nationals willing to serve in the French Armed Forces
International Legion (Ukraine), a Ukrainian foreign volunteer wing of the 2022 Russo-Ukrainian war
HMS Legion (1914), a Royal Navy World War I destroyer
HMS Legion (G74), a Royal Navy World War II destroyer sunk in 1942
Legion of the United States, a reorganization of the United States Army from 1792 to 1796
Various military legions, often composed of soldiers from a specific ethnic, national, religious or ideological background

Legion (Marvel Comics), a Marvel Comics antihero
Legion (DC Comics), a DC Comics supervillain
Legion of Super-Heroes, a DC Comics superhero team
The Legion (comics), one of the comic books where the Legion of Super-Heroes was published
Legion, a group of characters from the Spawn series
Legion, a member of the Special Executive
L.E.G.I.O.N., a 1989 DC Comics title and a team of superheroes, the 20th century forerunners to the Legion of Superheroes
Ghostbusters: Legion, a 2004 comic book series

"Legion" (Law & Order: Criminal Intent), the eighteenth episode in the second season of Law & Order: Criminal Intent
"Legion" (Red Dwarf), the second episode of Red Dwarf Series VI
Legion (1998 film) a 1998 made-for-television film
Legion (2010 film) a 2010 apocalyptic supernatural action film
The Legion (film) a 2020 film starring Mickey Rourke
Legions (film), a 2022 Argentine supernatural horror film
Legion (TV series), an FX TV series based on the Marvel Comics character
"Legion", an eighth-season episode of the television series Smallville
Legion, an alien kaiju seen in the film Gamera 2: Attack of Legion
Legion, a fictional computer network in the 2019 film Terminator: Dark Fate

Legion, a often appearing enemy in the Castlevania series.
Legion Gold, or simply Legion, a strategy game
Legions (Magic: The Gathering), a set of cards in the game Magic: The Gathering
Legion (Mass Effect), the adopted name of a synthetic intelligence in Mass Effect 2
Legion, central villain of the video game Shadow Man
Legion, an artificial intelligence unit in Command & Conquer 3: Kane's Wrath
World of Warcraft: Legion, the sixth World of Warcraft expansion set
The Legion, a group of killer characters in the horror video game Dead by Daylight
Watch Dogs: Legion, an action-adventure game and the third installment in the Watch Dogs series
Caesar's Legion, a faction in Fallout: New Vegas

Legion Records, started in 1997 by Michael Brosnan under the name Goatboy Records
Legion (band), a deathcore band from Columbus, Ohio
Legion, stage name of Erik Hagstedt, Swedish vocalist in the black metal band Marduk
The Legion, a hip hop group from the Bronx, New York, associated with Black Sheep
Legion (Deicide album), 1992
Legion (Creepy Nuts album), 2025
Legion, a 1985 album by Mark Shreeve
Legions, a 2013 album by the Danish band Artillery
"Legion", a song by Candiria from the album Kiss the Lie
"Legion", a song by HammerFall from the album No Sacrifice, No Victory
"Legion", a song by Junkie XL from the album Big Sounds of the Drags
"Legion", a song by Saviour Machine from the album Saviour Machine I
"Legion", a song by Slaughter Lord, covered by At the Gates in the 2002 re-issue of the album Slaughter of the Soul
"Legion", a song by Tesseract from the album War of Being
"Legion", a song by VNV Nation from the album Empires
"Legions", a song by Winds of Plague from the album Decimate the Weak

Military