A foreign fighter is someone who travels abroad to participate in an armed conflict, or fights for a country of which he or she is not a national, though different definitions have been used by different journalists, policymakers, and researchers, depending on what distinctions they've wished to make. [1] [2] [3]
Research into foreign fighter activity has been marked by a lack of common terminology between and among academics, policymakers, and journalists. With an expanding range of scholarly work on foreign fighters and non-state armed groups operating transnationally, generating a meaningful debate on foreign fighter mobilization and persistence requires a shared understanding of terms for discourse.