External Interventions and Civil Wars: Why Focus on Non-State Actors?
Existing research on the impact of external interventions into civil wars focuses mostly on states and international organizations. With the expansion of private military and security companies’ (PMSCs) presence in civil wars, there is a need to better understand the impact of such non-state actors on conflict dynamics. This chapter highlights the importance of understanding conditions under which PMSCs are more militarily effective in conflict zones, describes the existing focus in the study of PMSCs, and introduces a new theoretical focus that links variation in market competition to military effectiveness. It addresses previous data in the study of PMSCs and focuses on the benefits of new data, with specific focus on international PMSCs’ presence in major and minor civil wars.