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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==