However, the Athenians, distressed by the plague, and by the war that had recently broken out and was now raging, thought it a serious matter to add Lesbos with its fleet and untouched resources to the list of their enemies; and at first would not believe the charge, giving too much weight to their wish that it might not be true. But when an embassy which they sent had failed to persuade the Mitylenians to give up the union and preparations complained of, they became alarmed, and resolved to strike the first blow.

They accordingly suddenly sent off forty ships that had been got ready to sail round Peloponnese, under the command of Cleippides, son of Deinias, and two others;