About 400,000 people are estimated to have been killed in the war, including notable atrocities such as the 2014 Bentiu massacre. Although both men have supporters from across South Sudan's ethnic divides, subsequent fighting has been communal, with rebels targeting members of Kiir's Dinka ethnic group and government soldiers attacking Nuers. More than 4 million people have been displaced, with about 1.8 million of those internally displaced, and about 2.5 million having fled to neighboring countries, especially Uganda and Sudan.