Columbia subject headings:
Caribbean Area--History--To 1810.
Spain--Colonies--America--History--18th century.
Harvard subject headings:
Military art and science--Colonies--Spain--History.
Spain--Colonies--America--Defenses.
Spain--Colonies--Defenses--America.
Spain--History, Military--18th century.
Spain--History, Military.
Spain. Ejército--Colonial forces--America--History.
Princeton subject headings:
Caribbean Area--History--To 1810.
Spain--Colonies--America--History--18th century.