History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
after which Asopius sent most of the fleet home, and himself went on with twelve vessels to Naupactus, and after-wards raising the whole Acarnanian population made an expedition against Oeniadae, the fleet sailing along the Achelous, while the army laid waste the country.
The inhabitants, however, showing no signs of submitting, he dismissed the land forces and himself sailed to Leucas, and making a descent upon Nericus was cut off during his retreat, and most of his troops with him, by the people in those parts aided by some coast-guards;