History of the Peloponnesian War

And there, having communicated his conceit with the Acarnanians, when they would not approve of it because of his refusal to besiege Leucas, he himself with the rest of his army, Cephalonians, Zacynthians, and three hundred Athenians, the soldiers of his own fleet (for the fifteen galleys of Corcyra were now gone away), warred on the Aetolians, having Oeneon, a city of Locris, for the seat of his war.

Now these Locrians called Ozolae were confederates of the Athenians and were to meet them with their whole power in the heart of the country. For being confiners on the Aetolians and using the same manner of arming, it was thought it would be a matter of great utility in the war to have them in their army for that they knew their manner of fight and were acquainted with the country.