Columbia subject headings:
Europe--Foreign relations--17th century.
Europe--Foreign relations--18th century.
Neutrality--History--17th century.
Neutrality--History--18th century.
War (International law)
Harvard subject headings:
Europe--Foreign relations--17th century.
Europe--Foreign relations--18th century.
Neutrality--History--17th century.
Neutrality--History--18th century.
War (International law)
Princeton subject headings:
Europe--Foreign relations--17th century.
Neutrality--History--17th century.
Neutrality--History--18th century.
War (International law)