History of the Peloponnesian War

On this change being made, the party of Pisander and Alexicles, and all who were most devoted to the oligarchy, withdrew privily to Decelea; while Aristarchus alone of them, happening to be in office as general, took with all haste some of the most barbarous amongst the archers, and proceeded to Oenoe.

This was a fortress belonging to the Athenians on the borders of Boeotia, and in consequence of a blow that had been inflicted on them by the garrison, by cutting off a party of men on their return from Decelea, it was being besieged by the Corinthians, who had volunteered for the service, and had called the Boeotians also to their aid.

After communicating therefore with these, Aristarchus deceived those in Oenoe, by telling them that their countrymen in the city had made a general surrender to the Lacedmaeonians, and they must give up the place to the Boeotians; for that such were the terms of the capitulation. They therefore, believing him, inasmuch as he was one of the generals, and knowing nothing that had happened, in consequence of their being blockaded, evacuated the fort under truce.

It was in this manner that the Boeotians took and occupied Oenoe, and that the oligarchy and sedition at Athens came to an end.