Columbia subject headings:
France--Colonies--History--19th century.
France--History, Military--19th century.
Vietnam, Northern--History, Military--19th century.
Vietnam, Northern--History--19th century.
Harvard subject headings:
France--Colonies--History--19th century.
France--History, Military--19th century.
Vietnam, Northern--History, Military--19th century.
Vietnam, Northern--History--19th century.
Princeton subject headings:
France--Colonies--Vietnam.
Vietnam--History, Military--19th century.