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.
in repair. When their herald brought back no message of peace from the Corinthians and their ships were now fully manned, being eighty in number (for forty were besieging Epidamnus), they sailed out against the enemy and, drawing up in line, engaged
in battle; and they won a complete victory and destroyed fifteen ships of the Corinthians. On the same day it happened that their troops which were engaged in the siege of Epidamnus forced it to a capitulation, on condition that the other immigrants[*](i.e. the Ambraciots and Leucadians; cf. Thuc. 1.26.1.) should be sold into slavery but the Corinthians kept in bonds until something else should be agreed upon.
After the sea-fight the Corcyraeans set up a trophy of their victory at Leucimne, a promontory in the territory of Corcyra, and put to death the prisoners they had taken, with the exception of the Corinthians, whom they kept in fetters.
But afterwards, when the Corinthians and their allies had gone back home with their ships after their defeat, the Corcyraeans were masters of the whole sea in that quarter, and sailing to Leucas, the colony of the Corinthians, they ravaged the country and burned Cyllene, the naval arsenal of the Eleans, because they had furnished ships and money to the Corinthians.
And so for most of the time after the sea-fight they had control over the sea; and sailing against the allies of the Corinthians they kept harrying them, until the Corinthians, as the summer was drawing to an end,' seeing that their allies were suffering, sent ships and an army and encamped at Actium and near the promontory of Cheimerium in Thesprotis, as a protection for Leucas and the other cities that were friendly to themselves.