Columbia subject headings:
Rome--History, Military--265-30 B.C.
Rome--History--Empire, 30 B.C.-284 A.D.
Rome--Politics and government--30 B.C.-284 A.D.
Harvard subject headings:
Rome--History, Military--265 B.C.-30 B.C.
Rome--History--Empire, 30 B.C.-284 A.D.
Rome--Politics and government--30 B.C.-284 A.D.
Princeton subject headings:
Rome--History, Military--265-30 B.C.
Rome--History--Empire, 30 B.C.-284 A.D.
Rome--Politics and government--30 B.C.-284 A.D.