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.
Afterwards Asopius sent most of the ships back home, but had twelve with him when he reached Naupactus. Then later, having called out all the forces of the Acarnanians, he made an expedition against Oeniadae, sailing with the ships up the Achelous, while his army on land ravaged the country.
As, however, the inhabitants would not come over to him, he dismissed his army, but himself sailed to Leucas and made a descent upon Nericus. On his way back from Nericus he and part of his army were slain by the people of that place, who rallied to its defence, and by a few guards.[*](Foreigners (φρουρῶν as opposed to τῶν αὐτόθεν ξυνβοηθησάντων), possibly Corinthians.)