In the following year (B.C. 447) a revolution in Boeotia deprived Athens of her ascendency in that country. With an overweening contempt of their enemies, a small band of 1000 Athenian hoplites, chiefly composed of youthful volunteers belonging to the best Athenian families, together with a few auxiliaries, marched under the command of Tolmides to put down the revolt, in direct opposition to the advice of Pericles, who adjured them to wait and collect a more numerous force. The enterprise proved disastrous in the extreme. Tolmides was defeated and slain near Chaeronea, a large number of the hoplites also fell in the engagement, while a still larger number were taken prisoners. This last circumstance proved fatal to the interests of Athens in Boeotia. In order to recover these prisoners, she agreed to evacuate Boeotia, and to permit the re-establishment of the aristocracies which she had formerly overthrown. But the Athenian reverses did not end here. The expulsion of the partisans of Athens from the government of Phocis and Locris, and the revolt of Euboea and Megara, were announced in quick succession. The youthful Pleistoanax, king of Sparta, actually penetrated, with an army of Lacedaemonians and Peloponnesian allies, as far as the neighbourhood of Eleusis; and the capital itself, it is said, was saved only by Pericles having bribed the Spartan monarch. Pericles reconquered Euboea; but this was the only possession which the Athenians succeeded in recovering. Their empire on land had vanished more, speedily than it had been acquired; and they were therefore induced to conclude, at the beginning of B.C. 445, a THIRTY YEARS' TRUCE with Sparta and her allies, by which they consented to abandon all the acquisitions which they had made in Peloponnesus, and to leave Megara to be included among the Peloponnesian allies of Sparta.