History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
But the Plataeans alone fought as Boeotians [*](καταντικρύ.] Such is perhaps the force of the word, in the absence of any instance in which Thucydides uses it for ἄντικρυς. Otherwise the meaning of absolute or downright Boeotians, would suit the passage much better, as distinguishing between the Plataeans who actually lived in the country, and those before mentioned who were only colonies from it.) right in the face of Boeotians, as might have been expected, for the hatred they bore them. Of Rhodians and Cytherians, again, both of Doric race, the Cytherians, though colonists of the Lacedaemonians, were fighting in concert with the Athenians against the Lacedaemonians with Gylippus;
while the Rhodians, who were Argives by race, were compelled to wage war against the Syracusans, who were Dorians, and the Geloans, who were even their own colonists, serving with the Syracusans. Of the islanders around the Peloponnese, the Cephallenians and Zacynthians followed, indeed, as independent allies, but still, on account of their insular position, rather by constraint, because the Athenians commanded the sea.