The United Nations Refugee Agency (UNHCR), alongside 64 humanitarian and national civil society organizations, has appealed Monday for US$1 billion to provide essential humanitarian aid and protection to over 1.8 million people expected to arrive in five neighboring countries by the end of 2023, fleeing ongoing conflict in Sudan. One million refugees, returnees and foreign nationals have already crossed borders into the Central African Republic, Chad, Egypt, Ethiopia and South Sudan.