History of the Peloponnesian War

Of these the Chians followed them as free, not as tributaries of money, but of galleys. And these were almost all of them Ionians, descended from the Athenians, except only the Carystians, that are of the nation of the Dryopes. And though they were subjects and went upon constraint, yet they were Ionians against Dorians. Besides these there went with them Aeolians, namely, the Methymnaeans, subjects to Athens, not tributaries of money but of galleys; and the Tenedians and Aenians, tributaries. Now here, Aeolians were constrained to fight against Aeolians, namely, against their founders the Boeotians, that took part with the Syracusians.

But the Plataeans, and only they, being Boeotians, fought against Boeotians upon just quarrel. The Rhodians and Cythereans, Doric both, by constraint bore arms; one of them, namely the Cythereans, a colony of the Lacedaemonians, with the Athenians against the Lacedaemonians that were with Gylippus;

and the other, that is to say, the Rhodians, being by descent Argives, not only against the Syracusians, who were also Doric, but against their own colony, the Geloans, which took part with the Syracusians. Then of the islanders about Peloponnesus, there went with them the Cephallenians and Zacynthians, not but that they were free states, but because they were kept in awe as islanders by the Athenians, who were masters of the sea.

And the Corcyraeans, being not only Doric but Corinthians, fought openly against both Corinthians and Syracusians, though a colony of the one and of kin to the other, which they did necessarily (to make the best of it), but indeed no less willingly, in respect of their hatred to the Corinthians. Also the Messenians, now so called, in Naupactus, were taken along to this war, and the Messenians at Pylus, then holden by the Athenians.