Douglas H. Johnson is an independent scholar specializing in the history of Sudan, South Sudan, and Northeast Africa. He is the author, editor, and co-editor of fourteen books, including Nuer Prophets (1994), The Root Causes of Sudan’s Civil Wars (3 editions 2003-2016), and South Sudan: A New History for a New Nation (2016).Kuyok Abol Kuyok is the Undersecretary of the Ministry of General Education and Instruction and an Adjunct Associate Professor, School of Education, the University of Juba. He is the author of South Sudan: the Notable Firsts (2015), a biographical dictionary of South Sudan, and the editor of Peter Nyot Kok: A Tribute (2022).Nicki Kindersley is an historian and lecturer at Cardiff University, Wales and the author of New Sudans: Wartime Intellectual Histories in Khartoum (2024).

• PrefaceAcknowledgementsReader’s NotesMapsPrincipal Ethnic and Ethnolinguistic groups in Sudan and South SudanSouth Sudan in 1956Sudan-South South Border areaWestern Bahr el-Ghazal, showing Kafia Kingi and Hofrat al-NahasSouth Sudan-Ethiopian border showing the Baro Salient and the Ilemi TriangleAbyei AreaOil Concessions 2007Oil Developments in Unity StateSudan and South Sudan in 2011Acronyms and AbbreviationsChronologyIntroductionTHE DICTIONARYAppendices1. Censuses of South Sudan2. Indigenous Languages of South Sudan3. Comparative Shilluk King Lists4. Governors of the Southern Provinces5. Condominium Era Pacification Campaigns, 1899-19306. The Machakos Protocol7. Political Structures for Southern Sudan 1969-20118. Educational InstitutionsBibliographyAbout the Authors

Douglas H. Johnson is an independent scholar specializing in the history of Sudan, South Sudan, and Northeast Africa. He is the author, editor, and co-editor of fourteen books, including Nuer Prophets (1994), The Root Causes of Sudan’s Civil Wars (3 editions 2003-2016), and South Sudan: A New History for a New Nation (2016).Kuyok Abol Kuyok is the Undersecretary of the Ministry of General Education and Instruction and an Adjunct Associate Professor, School of Education, the University of Juba. He is the author of South Sudan: the Notable Firsts (2015), a biographical dictionary of South Sudan, and the editor of Peter Nyot Kok: A Tribute (2022).Nicki Kindersley is an historian and lecturer at Cardiff University, Wales and the author of New Sudans: Wartime Intellectual Histories in Khartoum (2024).

• PrefaceAcknowledgementsReader’s NotesMapsPrincipal Ethnic and Ethnolinguistic groups in Sudan and South SudanSouth Sudan in 1956Sudan-South South Border areaWestern Bahr el-Ghazal, showing Kafia Kingi and Hofrat al-NahasSouth Sudan-Ethiopian border showing the Baro Salient and the Ilemi TriangleAbyei AreaOil Concessions 2007Oil Developments in Unity StateSudan and South Sudan in 2011Acronyms and AbbreviationsChronologyIntroductionTHE DICTIONARYAppendices1. Censuses of South Sudan2. Indigenous Languages of South Sudan3. Comparative Shilluk King Lists4. Governors of the Southern Provinces5. Condominium Era Pacification Campaigns, 1899-19306. The Machakos Protocol7. Political Structures for Southern Sudan 1969-20118. Educational InstitutionsBibliographyAbout the Authors