Foreign fighter
A foreign fighter is someone who travels abroad to participate in a non-international armed conflict or fight for a country of which he or she is not a national
en-US/ˈfɑɹən ˈfaɪtɚ/
en-GB/ˈfɒɹən ˈfaɪtə/
A foreign fighter is someone who travels abroad to participate in a non-international armed conflict or fight for a country of which he or she is not a national