Columbia subject headings:
Great Britain--History, Military--19th century.
Great Britain--History, Military--20th century.
Nigeria, Northern--History, Military.
Harvard subject headings:
Great Britain--History, Military--19th century.
Great Britain--History, Military--20th century.
Nigeria, Northern--History, Military.
Princeton subject headings:
Nigeria, Northern--History.
Nigeria--History--1851-1899.
Nigeria--History--1900-1960.