History of the Peloponnesian War

Immediately at the commencement of the spring of the following summer, Dercyllidas, a Spartan, was sent with a small force by land to the Hellespont, to effect the revolt of Abydus, which is a colony of the Milesians; and the Chians, while Astyochus was at a loss how to succour them, were compelled by the pressure of the siege to a naval engagement.