History of the Peloponnesian War

The Peloponnesians hastened to engage first, and outflanking with their left the Athenian right sought to cut them off, if possible, from sailing out of the straits, and to drive their centre upon the shore, which was not far off. The Athenians perceiving their intention extended their own wing and outsailed them,

while their left had by this time passed the point of Cynossema. This, however, obliged them to thin and weaken their centre, especially as they had fewer ships than the enemy, and as the coast round Point Cynossema formed a sharp angle which prevented their seeing what was going on on the other side of it.

The Peloponnesians now attacked their centre and drove ashore the ships of the Athenians, and disembarked to follow up their victory.

No help could be given to the centre either by the squadron of Thrasybulus on the right, on account of the number of ships attacking him, or by that of Thrasyllus on the left, from whom the point of Cynossema hid what was going on, and who was also hindered by his Syracusan and other opponents, whose numbers were fully equal to his own. At length, however, the Peloponnesians in the confidence of victory began to scatter in pursuit of the ships of the enemy, and allowed a considerable part of their fleet to get into disorder.

On seeing this the squadron of Thrasybulus discontinued their lateral movement and, facing about, attacked and routed the ships opposed to them, and next fell roughly upon the scattered vessels of the victorious Peloponnesian division, and put most of them to flight without a blow. The Syracusans also had by this time given way before the squadron of Thrasyllus, and now openly took to flight upon seeing the flight of their comrades.