Columbia subject headings:
Hannover (Germany)--History.
Neutrality.
Prussia (Germany)--Foreign relations--1740-1815.
Prussia (Germany)--History--1740-1815.
Harvard subject headings:
Hannover (Germany)--History.
Neutrality.
Prussia (Germany)--Foreign relations--1740-1815.
Prussia (Germany)--History--1740-1815.
Princeton subject headings: