When the cause of Greek freedom had been overwhelmed at Chæronea, in the defeat of the allied Thebans and Athenians, Demosthenes, who had organized the unsuccessful resistance to Philip, still retained the favor of his countrymen, fickle as they were. With the exception of a short period of disfavor, he practically regulated the policy of Athens till his death in 322 B.C.
In 336 B.C., on motion of Ctesiphon, a golden crown was voted to Demosthenes by the Senate, in recognition of certain eminent services and generous contributions from his own means to the needs of the State. The decree was not confirmed by the Assembly, owing to the opposition of Æschines, who gave notice that he would bring suit against Ctesiphon for proposing an illegal measure. The case did not come up for trial, however, till 330 B.C., six years later. (The reason for this delay has never been clearly revealed.)
When Ctesiphon was summoned to appear, it was well understood that it was not he but Demosthenes who was in reality to be tried, and that the public and private record of the latter would be subjected to the most rigorous scrutiny. On that memorable occasion, people gathered from all over Greece to witness the oratorical duel of the two champions--for Demosthenes was to reply to Æschines. The speech of Æschines was a brilliant and bitter arraignment of Demosthenes; but so triumphant was the reply of the latter, that his opponent, in mortification, went into voluntary exile. The speech of Demosthenes 'On the Crown' has been generally accepted by ancients and moderns as the supreme attainment in the oratory of antiquity.
It is evident that a man the never-swerving champion of a cause which demanded the greatest sacrifice from a people devoted to self-indulgence, the never-sleeping opponent of the hirelings of a foreign enemy, and a persistent obstacle to men of honest conviction who advocated a policy different from that which seemed best to him, would of necessity bring upon himself bitter hostility and accusations of the most serious character. And such was the case. Demosthenes has been accused of many crimes and immoralities, some of them so different in character as to be almost mutually exclusive. The most serious charge is that of receiving a bribe from Harpalus, the absconding treasurer of Alexander. He was tried upon this charge, convicted, fined fifty talents, and thrown into prison. Thence he escaped to go into a miserable exile.