The Rift Valley Institute published on 27 March 2023 a paper titled "Resistance in the Peripheries: Civil War and Fragile Peace in Sudan & Ethiopia's Borderlands."
The government of Ethiopia has historically supported the Sudan People's Liberation Movement/Army (SPLM/A) while the government in Sudan has supported the Benishangul People's Liberation Movement (BPLM) in Ethiopia. At the moment there is not a military relationship between the SPLM/A and the Ethiopian government. Since 2020, however, the BPLM has received military support from the Sudanese government and its military.