The war in Yemen is contributing to what the United Nations says could become "the worst famine in the world in 100 years."

Humanitarian aid to refugee and internally displaced people (IDPs) has increasingly shifted from rural and camp environments to urban areas in recent years, with 60% of all refugees and 80% of all IDPs currently living in urban areas. Risks of violence for displaced persons in camp-based humanitarian settings are well documented and include gender-based violence, intimate partner violence, sexual violence, and forced marriages, as well as a number of other forms of inter-communal violence, discrimination, and denial of resources, assistance, or assets. However, little is known about types and drivers of violence and interventions to reduce violence among displaced and host populations in urban areas, who likely face a different set of challenges due to the complex infrastructure, sociopolitical context, and service provision systems found in cities.