The History of the Grecian War (1.49.6-1.50.1)

So that in this part the Corinthians and their confederates were vanquished, and the Corcyraeans had the victory. But in the left wing where the Corinthians were themselves they were far superior because the Corcyraeans had twenty galleys of their number, which was at first less than that of the Corinthians, absent in the chase of the enemy.

And the Athenians, when they saw the Corcyraeans were in distress, now aided them manifestly, whereas before, they had abstained from making assault upon any. But when once they fled outright and that the Corinthians lay sore upon them, then everyone fell to the business without making difference any longer; and it came at last to this necessity, that they undertook one another, Corinthians and Athenians.

The Corinthians, when their enemies fled, stayed not to fasten the hulls of the galleys they had sunk unto their own galleys that so they might tow them after, but made after the men, rowing up and down, to kill rather than to take alive, and through ignorance (not knowing that their right wing had been discomfited) slew also some of their own friends.