Egypt — nile borders (1): SudanEgyptSudan — nile borders (6): Central African Republic, Chad, Egypt, Eritrea, Ethiopia, South SudanSudanSouth Sudan — nile borders (6): Central African Republic, DR Congo, Ethiopia, Kenya, Sudan, UgandaSouth SudanEthiopia — nile borders (6): Djibouti, Eritrea, Kenya, Somalia, South Sudan, SudanEthiopiaEritrea — nile borders (3): Djibouti, Ethiopia, SudanEritreaMauritania — sahel borders (1): MaliMauritaniaMali — sahel borders (3): Burkina Faso, Mauritania, NigerMaliNiger — sahel borders (5): Benin, Burkina Faso, Chad, Mali, NigeriaNigerChad — sahel borders (5): Cameroon, Central African Republic, Niger, Nigeria, SudanChadBurkina Faso — sahel borders (4): Benin, Mali, Niger, TogoBurkina FasoTogo — niger_delta borders (2): Benin, Burkina FasoTogoBenin — niger_delta borders (4): Burkina Faso, Niger, Nigeria, TogoBeninNigeria — niger_delta borders (4): Benin, Cameroon, Chad, NigerNigeriaCameroon — niger_delta borders (6): Central African Republic, Chad, Congo, Equatorial Guinea, Gabon, NigeriaCameroonDjibouti — horn borders (3): Eritrea, Ethiopia, SomaliaDjiboutiSomalia — horn borders (3): Djibouti, Ethiopia, KenyaSomaliaKenya — horn borders (4): Ethiopia, Somalia, South Sudan, UgandaKenyaUganda — horn borders (3): DR Congo, Kenya, South SudanUgandaCentral African Republic — congo_basin borders (6): Cameroon, Chad, Congo, DR Congo, South Sudan, SudanCentral African RepublicDR Congo — congo_basin borders (5): Angola, Central African Republic, Congo, South Sudan, UgandaDR CongoCongo — congo_basin borders (5): Angola, Cameroon, Central African Republic, DR Congo, GabonCongoGabon — congo_basin borders (3): Cameroon, Congo, Equatorial GuineaGabonEquatorial Guinea — congo_basin borders (2): Cameroon, GabonEquatorial GuineaAngola — congo_basin borders (3): Congo, DR Congo, NamibiaAngolaNamibia — zambezi borders (2): Angola, BotswanaNamibiaBotswana — zambezi borders (2): Namibia, ZimbabweBotswanaZimbabwe — zambezi borders (2): Botswana, MozambiqueZimbabweMozambique — zambezi borders (2): Zimbabwe, MadagascarMozambiqueMadagascar — zambezi borders (1): MozambiqueMadagascar