The Counterinsurgency Dilemma: Foreign Fighter Influence on Insurgencies in Afghanistan and Somalia

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Episode 154 of the Irregular Warfare Podcast examines a core puzzle in intrastate conflict: how a small number of foreign fighters can exert outsized influence on insurgencies. Anchored in Professor Tricia Bacon’s The Counterinsurgency Dilemma, this episode explores when foreign fighters strengthen insurgent groups—and when they undermine them. While foreign fighters are often associated with higher levels of violence, they typically make up only a small share of insurgent forces. As Bacon argues, this reveals a key insight: local insurgents—not foreign fighters—drive outcomes. They control strategy, resources, and relationships with the population, making them the decisive actors in any…