History of the Peloponnesian War

The following winter, when the Lacedaemonians became aware that they were fortifying Argos, they made an expedition thither, themselves and their allies, except the Corinthians; and there was also a party in Argos itself that was working in their interest. The commander of the army was Agis son of Archidamus, king of the Lacedaemonians.

The support from the city which they expected to find ready failed them, but they seized and demolished the walls that were being built; and they also seized Hysiae, a place in Argive territory, slew all the free men whom they caught, and then withdrew and dispersed to their several cities.

After this the Argives in their turn invaded Phliasia and ravaged it before they returned home, because the Phliasians had received fugitives of theirs, most of whom had settled there.

Also during the same winter the Athenians shut off the Macedonians from the sea, charging Perdiccas with the league which he had made with the Argives and the Lacedaemonians; also that when they had prepared to lead an army against the Chalcidians in Thrace and against Amphipolis, under the command of Nicias son of Niceratus, he had been false to the alliance, and the expedition had been broken up chiefly because of his defection. Accordingly, he was regarded as an enemy. So this winter ended and with it the fifteenth year of the war.