Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--1888-1918.
Germany--Foreign relations--United States.
United States--Foreign relations--Germany.
War, Maritime (International law)
World War, 1914-1918
World War, 1914-1918--Germany.
World War, 1914-1918--Political aspects.
Princeton subject headings:
Germany--Foreign relations--1888-1918.
World War, 1914-1918--Germany.
World War, 1914-1918--Political aspects.