Columbia subject headings:
National security--Persian Gulf States.
National security--Red Sea Region.
Persian Gulf Region--History.
Persian Gulf Region--Strategic aspects.
Red Sea Region--History.
Red Sea Region--Strategic aspects.
Harvard subject headings:
Princeton subject headings:
National security--Persian Gulf Region.
National security--Red Sea region.
National security--Red Sea.
Persian Gulf Region--Politics and government.
Persian Gulf Region--Relations.
Persian Gulf Region--Strategic aspects.
Red Sea--Relations.
Red Sea--Strategic aspects.