Darius accordingly sent for Histiaeus to come to him at Sardis, saying that there was a service of great importance on which he wished to employ him. Histiaeus, of course, obeyed such a summons with eager alacrity. When he arrived, Darius expressed great pleasure at seeing him once more, and said that he had constant need of his presence and his counsels. He valued, above all price, the services of so faithful a friend, and so sagacious and trusty an adviser. He was now, he said, going to Susa, and he wished Histiaeus to accompany him as his privy counselor and confidential friend. It would be necessary, Darius added, that he should give up his government of Miletus, and also the city in Thrace which he had begun to build; but he should be exalted to higher honors and dignities at Susa in their stead. He should have apartments in the king's palace, and live in great luxury and splendor. Histiaeus was extremely disappointed and chagrined at this announcement. He was obliged, however, to conceal his vexation and submit to his fate. In a few days after this, he set out, with the rest of Darius's court, for the Persian capital, leaving a nephew, whose name was Aristagoras, as governor of Miletus in his stead. Darius, on the other hand, committed the general charge of the whole coast of Asia Minor to Artaphernes, one of his generals. Artaphernes was to make Sardis his capital. He had not only the general command of all the provinces extending along the shore, but also of all the ships, and galleys, and other naval armaments which belonged to Darius on the neighboring seas. Aristagoras, as governor of Miletus, was under his general jurisdiction. The two officers were, moreover, excellent friends. Aristagoras was, of course, a Greek, and Artaphernes a Persian. Among the Greek islands situated in the AEgean Sea, one of the most wealthy, important, and powerful at that time, was Naxos. It was situated in the southern part of the sea, and about midway between the shores of Asia Minor and Greece. It happened that, soon after Darius had returned from Asia Minor to Persia, a civil war broke out in that island, in which the common people were on one side and the nobles on the other. The nobles were overcome in the contest, and fled from the island. A party of them landed at Miletus, and called upon Aristagoras to aid them in regaining possession of the island. Aristagoras replied that he would very gladly do it if he had the power, but that the Persian forces on the whole coast, both naval and military, were under the command of Artaphernes at Sardis. He said, however, that he was on very friendly terms with Artaphernes, and that he would, if the Naxians desired it, apply to him for his aid. The Naxians seemed very grateful for the interest which Aristagoras took in their cause, and said that they would commit the whole affair to his charge.