Immediately afterward a dissension broke out between Cleomenes and Demaratus, the other king of Sparta, who had hitherto supported his colleague in all his designs, and Demaratus hastily quitted Eleusis, and returned to Lacedaemon.

At this disunion between the kings of Sparta, accompanied, as it was, by the secession of the Corinthians, the other confederates broke up the camp, returned home, and left Cleomenes with so scanty a force that he was compelled to forego his resentment and his vengeance, and retreat from the sacred city.

The Athenians now turned their arms against the Chalcidians, who had retired to Euboea; but, encountering the Boeotians, who were on their march to assist their island ally, they engaged and defeated them with a considerable slaughter.

Flushed by their victory, the Athenians rested not upon their arms--on the same day they crossed that narrow strait which divided them from Euboea, and obtained a second and equally signal victory over the Chalcidians.

There they confirmed their conquest by the establishment of four thousand colonists [255] in the fertile meadows of Euboea, which had been dedicated by the islanders to the pasturage of their horses.