Original sentence: a cushitic people, who inhabit and are native to much of Horn of Africa and in particular the Somali Peninsula:  Djibouti, Northern Frontier Districts (NFD), parts of Ethiopia, Somaliland (RSL) and Somalia.by ethnicity, a member of the Somali people; by nationality, a citizen of Somalia & Somaliland
Edited sentence: a cushitic people, who inhabit and are native to much of Horn of Africa and in particular the Somali Peninsula:  Djibouti, Northern Frontier Districts (NFD), occupied parts of Ethiopia and Somalia.by ethnicity, a member of the Somali people; by nationality, a citizen of Somalia