History of the Peloponnesian War

Of the islanders round Peloponnese, the Cephallenians and Zacynthians accompanied the Athenians as independent allies, although their insular position really left them little choice in the matter, owing to the maritime supremacy of Athens, while the Corcyraeans, who were not only Dorians but Corinthians, were openly serving against Corinthians and Syracusans, although colonists of the former and of the same race as the latter, under color of compulsion, but really out of free will through hatred of Corinth.

The Messenians, as they are now called in Naupactus and from Pylos, then held by the Athenians, were taken with them to the war. There were also a few Megarian exiles, whose fate it was to be now fighting against the Megarian Selinuntines.