History of the Peloponnesian War

Now the fleet from Corinth and the rest of the confederates coming from the Crisaean Bay, which ought to have joined Cnemus, in order to prevent the Acarnanians on the coast from succouring their countrymen in the interior, did not do so; but they were compelled, about the same time as the battle was fought at Stratus, to come to an engagement with Phormio and the twenty Athenian vessels that kept guard at Naupactus.

For Phormio kept watching them as they coasted along out of the gulf, wishing to attack them in the open sea.

But the Corinthians and the allies were not sailing to Acarnania with any intention to fight by sea, but were equipped more for land service. When, however, they saw them sailing along opposite to them, as they themselves proceeded along their own coast; and on attempting to cross over from Patrae in Achaia to the mainland opposite, on their way to Acarnania, observed the Athenians sailing against them from Chalcis and the river Evenus; (for they had not escaped their observation when they had endeavoured to bring to secretly during the night;) under these circumstances they were compelled to engage in the mid passage.

They had separate commanders for the contingents of the different states that joined the armament, but those of the Corinthians were Machaon, Isocrates, and Agatharcidas.