History of the Peloponnesian War

The Athenians also made their preparations as they had designed, having gotten timber and built their navy this same winter, and fortified the promontory of Sunium that their cornboats might come about in safety. Also they abandoned the fort in Laconia, which they had built as they went by for Sicily. And generally where there appeared expense upon anything unuseful, they contracted their charge.

Whilst they were on both sides doing thus, there came unto Agis about their revolt from the Athenians, first the ambassadors of the Euboeans. Accepting the motion, he sent for Alcamenes, the son of Sthenelaidas, and for Melanthus from Lacedaemon to go commanders into Euboea. Whom, when he was come to him with about three hundred freedmen, he was now about to send over. But in the meantime came the Lesbians, they also desiring to revolt;

and by the means of the Boeotians Agis changed his former resolution and prepared for the revolt of Lesbos, deferring that of Euboea, and assigned them Alcamenes, the same that should have gone into Euboea, for their governor; and the Boeotians promised them ten galleys and Agis other ten. Now this was done without acquainting therewith the state of Lacedaemon.

For Agis, as long as he was about Deceleia with the power he had, had the law in his own hands to send what army and whither he listed and to levy men and money at his pleasure. And at this time, the confederates of him (as I may call them) did better obey him than the confederates of the Lacedaemonians did them at home; for having the power in his hands, he was terrible wheresoever he came. And he was now for the Lesbians.

But the Chians and Erythraeans, they also desiring to revolt, went not to Agis, but to the Lacedaemonians in the city; and with them went also an ambassador from Tissaphernes, lieutenant to king Darius in the low countries of Asia. For Tissaphernes also instigated the Peloponnesians and promised to pay their fleet.