Millions of people live in South Sudanese cities such as Juba, the capital, Wau, Yei and Renk, which are frequent targets of violence.
Health care in South Sudan: Beating the odds
Forced to flee or left behind: The struggle for survival in Yambio, South Sudan (4)
South Sudan: Surviving cholera outbreak in Juba following upsurge in violence (10)
Courage under fire: South Sudanese women surviving against all odds
South Sudan: Helping people find each other after fleeing Wau