Columbia subject headings:
Confederation of states--Horn of Africa.
Eritrea--Foreign relations--Ethiopia.
Ethiopia--Foreign relations--Eritrea.
Horn of Africa--Politics and government.
Harvard subject headings:
Confederation of states--Horn of Africa.
Eritrea--Foreign relations
Eritrea--Foreign relations--Ethiopia.
Ethiopia--Foreign relations--Eritrea.
Horn of Africa--Politics and government.
Princeton subject headings:
Confederation of states--Horn of Africa.
Eritrea--Foreign relations--Ethiopia.
Ethiopia--Foreign relations--Eritrea.
Horn of Africa--Politics and government.