East African Campaign (World War II) between the Kingdom of Italy and the United Kingdom, the Commonwealth of Nations, the Kingdom of Belgium, and the Ethiopian Empire, 1940–1941
Eritrean War of Independence 1961 - 1991, between Eritrean liberation fronts (primarily the EPLF and early on also the ELF) and the Ethiopian Empire (1961–1974) and Marxist Derg-ruled Ethiopia (1974–1991)
Shifta War 1963-1967, separatist insurgency by ethnic Somalis in Kenya
Ethiopian Civil War 1974-1991, between the Derg (ruling government of Ethiopia) and various rebel groups, as well as amongst the rebel groups, including the Marxist Ethiopian EPRP, MEISON, and TPLF, the Eritrean EPLF, ELF, the monarchist EDU (in the first stage of the war), and the Somali WSLF; included Red Terror
Ogaden War 1977 - 1978, between Ethiopia and Somalia