History of the Peloponnesian War

And as they wished to muster there the whole army, in case any part had been left behind, and to review it, as well as to persuade the Thurians to join them as zealously as possible in the expedition, and to have considering their present position, the same foes and friends as the Athenians, they waited awhile in Thuria, and were prosecuting these designs.

About the same time, the Peloponnesians in the five and twenty ships, who, to secure the passage of the merchantmen to Sicily, were anchored over against the fleet at Naupactus, having made their preparations for a sea-fight, and having manned some additional ships, so that they were now but little inferior to the Athenian force, stationed themselves off Erineus in Achae, in the territory of Rhypa.

And the place in which they were stationed being in the form of a crescent, their land forces which had come to their assistance from the Corinthians, and from their allies on the spot, were ranged on the projecting headlands on both sides; while the ships occupied the intervening space, blocking up the entrance. The commander of the fleet was Polyanthes, a Corinthian.

The Athenians sailed out against them from Naupactus with three and thirty ships, under the command of Diphilus.

The Corinthians at first remained stationary, but afterwards, having raised their signal for battle, when there appeared to be a favourable opportunity, they advanced upon the Athenians, and engaged them. For a long time they resisted each other;