Columbia subject headings:
European Union--Ireland.
Ireland--Foreign relations.
National security--European Union countries.
National security--Ireland.
Neutrality--Ireland.
Security, International.
Harvard subject headings:
Europe--Foreign relations--Ireland.
Ireland--Foreign relations--Europe.
National security--Europe
National security--Ireland.
Neutrality--Ireland.
Princeton subject headings:
European Union--Ireland.
Ireland--Foreign relations.
National security--European Union countries.
National security--Ireland.
Neutrality--Ireland.
Security, International.