Columbia subject headings:
France--Boundaries.
France--Foreign relations--1852-1870.
Franco-Prussian War, 1870-1871--Causes.
Franco-Prussian War, 1870-1871.
Napoleon III, Emperor of the French, 1808-1873.
Harvard subject headings:
France--Boundaries.
France--Foreign relations--1852-1870.
Franco-Prussian War, 1870-1871
Germany--Foreign relations--1848-1870.
Napoleon III, Emperor of the French, 1808-1873.
Princeton subject headings:
France--Boundaries.
France--Foreign relations--1852-1870.
Franco-Prussian War, 1870-1871.
Napoleon III, Emperor of the French, 1808-1873.