History of the Peloponnesian War

And the Athenians, who notwithstanding had rather the better, when the Corinthians were gone away erected a trophy. But the Corinthians, having been reviled at their return by the ancient men of the city, about twelve days after came again prepared and set up their trophy likewise, as if the victory had been theirs. Hereupon the Athenians sallying out of Megara with a huge shout both slew those that were setting up the trophy and, charging the rest, got the victory.

The Corinthians, being overcome, went their way; but a good part of them, being hard followed and missing their way, lighted into the enclosed ground of a private man, which fenced with a great ditch had no passage through.

Which the Athenians perceiving, opposed them at the place by which they entered with their men of arms and, encompassing the ground with their light armed soldiers, killed those that were entered with stones. This was a great loss to the Corinthians, but the rest of their army got home again.

About this time the Athenians began the building of their long walls from the city down to the sea, the one reaching to the haven called Phaleron, the other to Piraeus.

The Phoceans also making war upon Boeum, Cytinium, and Erineus, towns that belonged to the Dorians of whom the Lacedaemonians are descended, and having taken one of them, the Lacedaemonians, under the conduct of Nicomedes the son of Cleombrotus in the place of Pleistoanactes son of king Pausanias who was yet in his minority, sent unto the aid of the Dorians fifteen hundred men of arms of their own, and of their confederates ten thousand.