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.[1][2][3]
^Asal, Victor; Malet, David (2021). "Nobody More Terrible than the Desperate: Conflict Conditions and Rebel Demand for Foreign Fighters". Studies in Conflict & Terrorism: 1–19. doi:10.1080/1057610X.2021.1961715.
^Cragin, R. Kim (2017). "The Challenge of Foreign Fighter Returnees". Journal of Contemporary Criminal Justice. 33 (3): 292–312. doi:10.1177/1043986217697872.
^Malet, David (2015). "Foreign Fighter Mobilization and Persistence in a Global Context". Terrorism and Political Violence. 27 (3): 454–473. doi:10.1080/09546553.2015.1032151.