Columbia subject headings:
European Union countries--Defenses.
European Union countries--Military policy.
European Union countries--Military relations--United States.
North Atlantic Treaty Organization--Europe.
United States--Military relations--European Union countries.
Harvard subject headings:
European Union countries--Defenses.
European Union countries--Military policy.
European Union countries--Military relations--United States.
North Atlantic Treaty Organization--Europe.
United States--Military relations--European Union countries.
Princeton subject headings:
European Union countries--Defenses.
European Union countries--Military policy.
European Union countries--Military relations--United States.
North Atlantic Treaty Organization--Europe.
United States--Military relations--European Union countries.