1908 The completion of the process of defining all present-day Ethiopian territories except Eritrea through the conclusion of boundary treaties with Britain, France and Italy.

1922 Ethiopia's admission into membership of the League of Nations.

1928 The establishment of the royal bodyguard.

1930 The crowning of Haile Selassie I as King of Ethiopia.

1932 The establishment of the Holeta Military Academy.

1936–41 The occupation of Ethiopia by Italy.

1941 The liberation of Ethiopia by the Allied forces. Eritrea which had been under Italian colonial rule for fifty years comes under British administration as enemy-occupied territory.

1948 The return to Ethiopia of the Ogaden which had come under British administration from 1941.

1952 The federation of Eritrea with Ethiopia in accordance with a UN General Assembly resolution. Economic and military agreements concluded between Ethiopia and the US.

1957 The establishment of the Harar Military Academy.

1958 The establishment of the Eritrean Liberation Movement.

1960 An abortive coup d'état against Haile Selassie by senior officers and the royal bodyguard. The emergence of British and Italian Somalilands into independence as the Republic of Somalia. The establishment of WSLF in Mogadishu.

1962 The dissolution of Eritrea's federal status and its absorption into the unitary state of Ethiopia. The formation of the Confederation of Ethiopian Labour Unions.

1965 The formation of the University Students' Union of Addis Ababa.

1968 The formation of an underground political organization abroad which later becameAESM.

1970 The formation of EPLF.

1972 Formation of EPRP abroad. US starts demoting its military presence in Ethiopia.

1973 Successful Arab pressure on Ethiopia to cut diplomatic relations with Israel.