He realised that the Greeks would prove powerful auxiliaries in such a contingency; and as soon as he had set up his court at Sardes, he planned how best to conciliate their favour, or at least to win over those whose support was likely to be most valuable. Athens, as a maritime power, was not in a position to support him in an enterprise which especially required the co-operation of a considerable force of heavily armed infantry. He therefore deliberately espoused the cause of the Peloponnesians, and the support he gave them was not without its influence on the issue of the struggle: the terrible day of AEgos Potamos was a day of triumph for him as much as for the Lacedaemonians (405 B.C.). His intimacy with Lysander, however, his constant enlistments of mercenary troops, and his secret dealings with the neighbouring provinces, had already aroused suspicion, and the satraps placed under his orders, especially Tissaphernes, accused him to the king of treason. Darius summoned him to Susa to explain his conduct (405 B.C.), and he arrived just in time to be present at his father's death (404), but too late to obtain his designation as heir to the throne through the intervention of his mother, Parysatis; Arsaces inherited the crown, and assumed the name of Artaxerxes. [Illustration: 280.jpg ARTAXERXES MNEMON] Drawn by Faucher-Gudin, from a coin in the Cabinet des Medailles. This coin, which was struck at Mallos, in Cilicia, bears as a counter-mark the figure of a bull and the name of the city of Issus.