Conflict escalation during neutral and biased humanitarian military interventions

This article considers the effects of humanitarian military interventions (HMIs) on conflict in the countries in which they have been used. Theoretically, neutral HMIs, in which interveners target all violent actors, are expected to have a pacifying effect on conflict intensity by increasing the cost of violence for all parties—while biased HMIs can escalate conflict intensity, by reducing the cost of violence and so encouraging the supported parties to become more violent. The empirical results show that neutral HMIs do seem to lead to lower conflict intensity in the targeted countries, relative to other conflict-affected countries. Anti-rebels HMIs are, observed to escalate conflict both in the short and the long run, while the evidence for anti-government HMIs is mixed.