Alcibiades (31.4-31.5)

However, the day was not won without a battle. The Peloponnesians, Boeotians and Megarians who were in garrison at Byzantium routed the ships’ crews and drove them back on board again. Then, perceiving that the Athenians were inside the city, they formed in battle array and advanced to attack them. A fierce battle followed, but Alcibiades was victorious with the right wing, as well as Theramenes with the left, and they took prisoners no less than three hundred of the enemy who survived.

Not a man of the Byzantians was put to death or sent into exile after the battle, for it was on these conditions that the men who surrendered the city had acted, and this was the agreement with them; they exacted no special grace for themselves. Therefore it was that when Anaxilaus was prosecuted at Sparta for treachery, his words showed clearly that his deeds had not been disgraceful. He said that he was not a Lacedaemonian, but a Byzantian, and it was not Sparta that was in peril. Considering therefore the case of Byzantium, he saw that the city was walled up, that no help could make its way in,