This dissertation examines the political impact of return migration after civil war. Violence wrought by civil war forces millions of people to flee their homes. While scholars have demonstrated how these population movements can spread and exacerbate conflict, return-migration is assumed to be a purely logistical issue. Once the war is over, people will simply return home and pick up where they left off. Yet, conflict between returning and non-migrant populations is a nearly ubiquitous issue for post-conflict societies from South Sudan to Iraq and Rwanda.