Columbia subject headings:
Great Britain. Army--History--20th century.
Mechanization, Military--Great Britain--History.
Tank warfare--History.
Harvard subject headings:
Great Britain. Army--History--20th century.
Mechanization, Military--Great Britain--History.
Tank warfare--History
Princeton subject headings:
Great Britain. Army--History--20th century.
Mechanization, Military--Great Britain--History.
Tank warfare--History.