Xenophon Hellenica 3.1.3

[3]
  Now when Tissaphernes, who was thought to have ¹ proved himself very valuable to the King in the war against his brother, was sent down as satrap both of the provinces which he himself had previously ruled and of those which Cyrus had ruled, he straightway ² demanded that all the Ionian cities should be subject to him. But they, both because they wanted to be free and because they feared Tissaphernes, inasmuch as they had chosen Cyrus, while he was living, instead of him, refused to admit him into their cities and sent ambassadors to Lacedaemon asking that the Lacedaemonians, since they were the leaders of all Hellas, should undertake to protect them also, the Greeks in Asia, in order that their land might not be laid waste and that they themselves might be free.