The defeat and death of darius ended the conquest phase of Alexander's campaign. The four Achaemenid capitals were in his possession, along with their treasuries; the Greek allies had been dismissed, with bonus pay; satraps, strategoi, phrourarchoi, and gazophylakes had been appointed; and he could claim the eastern satrapies as his by right of conquest. The struggle for legitimacy continued, however, and it was necessary to overcome any rival claims. The period from 330 to 328 was one in which Alexander fought to establish his legitimacy and authority.

THE USURPATION OF THE ROYAL TITLE BY BESSUS

If Alexander had hoped that the death of Darius would bring the war against Persia to an end, he was soon disappointed. Those who had betrayed their king fled into Bactria via Margiana (the Merv Oasis) and attempted to rally the splendid horsemen of Central Asia and their local barons. Bessus, a relative of Darius (though we do not know how close the relationship was), wore the tiara upright, in the style of kings, and took the name Artaxerxes (V). Politically, it was a major setback for Alexander, who was himself posing as the “legitimate” successor of Darius, having assumed the trappings of Persian royalty. For this reason, too, in an act of piety, he had ordered that the dead king be given a state funeral; Bessus, as regicide and usurper, could expect no mercy.