History of the Peloponnesian War

There he made his plan known to the Acarnanians, but they would not agree to it because of his refusal to invest Leucas; he therefore set out upon his expedition against the Aetolians without them, taking the rest of his army, which consisted of Cephallenians, Messenians, Zacynthians, and three hundred Athenian marines from his own ships—for the fifteen Corcyraean ships had gone back home. The base from which he started was Oeneon in Locris.

The people of this country, Ozolian Locris, were allies, and they with their whole force were to meet the Athenians in the interior; for since they were neighbours of the Aetolians and used the same sort of arms, it was believed that their help would be of great service on the expedition on account of their knowledge both of the Aetolian manner of fighting and of the country.