History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

But it was chiefly in the war that arose a long time ago between the Chalcidians and the Eretrians,[*](The war for the Lelantine Plain (cf. Hdt. 5.99; Strabo, x. i. 11); usually placed in the seventh century, but by Curtius in the eighth (see Hermes, x. pp. 220 if.).) that all the rest of Hellas took sides in alliance with the one side or the other.