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.