Columbia subject headings:
Imperialism.
Military art and science--Rome--History.
Rome--History, Military--30 B.C.-476 A.D.
Tacitus, Cornelius.
Harvard subject headings:
Military planning--Rome.
Rome--History, Military--Historiography.
Rome--History, Military.
Tacitus, Cornelius--Knowledge--Military art and science.
Princeton subject headings:
Imperialism.
Military art and science--Rome--History.
Rome--History, Military--30 B.C.-476 A.D.
Tacitus, Cornelius.