History of the Peloponnesian War

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.