Columbia subject headings:
Harvard subject headings:
Military art and science--History--19th century--Encyclopedias.
Military art and science--History--20th century--Encyclopedias.
Military history, Modern--19th century--Encyclopedias.
Military history, Modern--20th century--Encyclopedias.
Princeton subject headings:
Military history, Modern--Encyclopedias.
Warfare, Conventional--Encyclopedias.