Foreign legion

Foreign Legion most often refers to:
 * French Foreign Legion, a unit of the French Army

Foreign Legion may also refer to:

Military

 * Brigade of Gurkhas, light infantry unit of the British Army
 * Foreign volunteers, a term for troops joining a foreign army
 * International Brigades, of the Spanish Civil War
 * International Legion, created in 1860 by Giuseppe Garibaldi
 * International Freedom Battalion, a leftist foreign fighters fighting for the Rojava forces during the Syrian Civil War
 * International Legion of Territorial Defense of Ukraine, a Ukrainian brigade created during the 2022 Russian invasion of Ukraine
 * King's German Legion (KGL), a British Army unit of expatriate Germans during the Napoleonic Wars
 * Mahal (Israel), foreigners serving in the Israeli army
 * Polish Legions (Napoleonic period), Polish military units that served with the French Army, 1790s–1810s
 * Portuguese Legion (Napoleonic Wars), a Portuguese military force in Napoleon's Imperial Armies
 * Rhodesian Light Infantry, informally known as Rhodesian Foreign Legion (1961–1980)
 * Royal Dutch East Indies Army (KNIL), informally known as Dutch Foreign Legion (1830–1950)
 * Royal Sicilian Regiment (1806–1816)
 * Russian–German Legion, a Russian Army unit of expatriate German personnel during the Napoleonic Wars
 * Spanish Legion, a quasi-independent unit of the Spanish Army
 * Värvat främlingsregemente, Recruited Foreigners Regiment, Swedish regiment of Polish deserters
 * YPG International, foreign legion branches of the People's Protection Units (YPG).

Entertainment

 * The Foreign Legion, a 1928 silent film
 * Foreign Legion (band), a punk band from Wales
 * Foreign Legion (album), a 2002 album by Murfreesboro
 * Foreign Legion, a 2010 album by Tin Hat
 * Foreign Legion (wrestling) (La Legión Extranjera), a loosely affiliated group in Mexican wrestling
 * Foreign Legions, a 2001 anthology edited by David Drake