Contiguity and Military Escalation in Major Power Rivalries, 1816-1980

This research note analyzes the importance of geography for the study of conflict and explores the question: Does the geographic location (relative to the nations involved) of a confrontation influence the likelihood that the confrontation will escalate to war? It was discovered that if a dispute is contiguous by land to one of the disputants, the likelihood of escalation is increased (and increased even more if both sides are contiguous to the site). Ninety-two percent of the wars in the sample began with a dispute that was contiguous to one or both disputants; only two percent of the noncontiguous disputes escalated to war. Various interpretations of the results and suggestions for future research are noted.