... aristocracies were integrated into the Roman Empire.ACTA02 8/12/06 11:11 AM Page 2 A COMPANION TO THE ROMAN ARMY ACTA01 8/12/06 11:10 AM Page iIntroduction 3 The army retained a central role ... Literature xxiiiACTA01 8/12/06 11:11 AM Page xxiiiHA, Caracalla CaracallaHA, Comm. CommodusHA, Gall. GallienusHA, Hadr. HadrianusHA, Marc. Marcus AureliusHA, Pert. PertinaxHA, Sev. Septimius ... concentrated, but this role had changed significantly.Waging war remained the largest task undertaken by the state, and the army was the largest institution that the state created. It certainly was the...