The United Nations said today that war and famine have forced more than two million children in South Sudan to flee their homes, creating the most worrying refugee crisis in the world. The civil war in the oil-producing country began two years after it won independence from neighbouring Sudan, when President Salva Kiir fired his deputy in 2013. The fighting that followed split the country along ethnic lines, spurred hyperinflation and plunged parts of the nation into famine, creating Africa's biggest refugee crisis since the Rwandan genocide in 1994.<br/><br/>In a country of 12 million people, nearly three in every four children do not go to school, UNHCR and the U.N. children's agency UNICF said. More than one million children have fled outside South Sudan while another one million are internally displaced. Many South Sudanese refugees have fled into neighboring Uganda, Kenya, Sudan or Ethiopia, nations which are already struggling to provide enough food and resources for their own populations