History of the Peloponnesian War

When the Peloponnesians, being now engaged, outflanked their opponents, and were surrounding their right, the Acarnanians, rising from the ambuscade, fell on them in the rear, and broke them; so that they did not stand to make any resistance, and, moreover, by their panic threw their main army into flight: for when they saw the division of Eurylochus, and the bravest of their forces being cut to pieces, they were far more alarmed. It was the Messenians, posted in that part of the field with Demosthenes, that performed the chief part of the work.

But the Ambraciots and those in the right wing defeated the division opposed to them, and pursued it back to Argos; for they are the most warlike of all in those parts.