This report examines all forms of migration: forced and voluntary, domestic and cross-border, and in response to different pressures (particularly disasters and conflict). It focuses on the very large numbers of people moving out of conflict-affected places, across international borders, into urban areas of neighbouring or nearby countries. The report assesses the impact of mass displacement on the wellbeing of all urban residents, using an urban resilience framework to explore how different parts of the system respond to large influxes of people moving into areas often already suffering from inadequate housing, a lack of basic services and insecurity.