Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--1848-1870.
Germany--Foreign relations--1871-1888.
Germany--Foreign relations--1888-1918.
Germany--Military policy.
Germany. Reichsmarine--History--19th century.
Germany. Reichsmarine--History--20th century.
Princeton subject headings:
Germany--Foreign relations--1848-1870.
Germany--Foreign relations--1871-1888.
Germany--Foreign relations--1888-1918.
Germany--Military policy.
Germany. Reichsmarine--History--19th century.
Germany. Reichsmarine--History--20th century.