Columbia subject headings:
Rome--History, Military--30 B.C.-476 A.D.
Rome--History--Empire, 284-476.
Rome--History--Germanic Invasions, 3rd-6th centuries.
Harvard subject headings:
Rome--History, Military--30 B.C.-476 A.D.
Rome--History--Empire, 284-476
Princeton subject headings:
Rome--History, Military--30 B.C.-476 A.D.