For most of the South Sudanese Civil War, the fighting was focused in the Greater Upper Nile region. After the clashes in Juba in 2016, the fighting largely shifted to the previously safe haven of Equatoria, where the bulk of SPLM-IO forces went for shelter. Accounts point to both sides targeting civilians on ethnic lines between the Dinka and the dozens of ethnic groups among the Equatorians who are historically in conflict with the Dinka, such as the Karo, who include the Bari. Witnesses report Dinka soldiers threatening villagers that they will kill all Kakwa people for their alleged support to Machar and killing Pojulu people while sparing those who they find can speak Dinka. A UN investigation said rape was being used a tool of ethnic cleansing and Adama Dieng, the U.N.'s Special Adviser on the Prevention of Genocide, warned of genocide after visiting areas of fighting in Yei.