History of the Peloponnesian War

Accordingly the Peloponnesians, falling upon their centre, drove the Athenian ships ashore and landed to follow up their victory, having had a decided advantage in the action.

To assist their centre was in the power neither of Thrasybulus and his men on the right, by reason of the multitude of the ships that were pressing hard upon them, nor of the followers of Thrasyllus on the left; for that part of the field was concealed from him by the headland of Cynossema, and at the same time the Syracusans and the rest who were arrayed against him, being not inferior in number, hemmed him in. But finally the Peloponnesians, pursuing fearlessly in the flush of victory, some chasing one vessel, some another, began to fall into disorder in a part of their own line.

The Athenians under Thrasybulus, realizing this, now ceased extending their flank, and immediately facing about began to fight the ships that were bearing down upon them, and put them to rout; then intercepting the ships in the victorious part of the Peloponnesian line that had strayed out of line, they smote them and drove most of them into headlong flight without resistance. It so chanced that the Syracusans on their part had already given ground to Thrasyllus and his division, and they took to flight still more when they saw the rest fleeing.