This defeat was a death-blow to the hopes of Xerxes, and sealed the fate of the expedition. From the moment that he realized to himself the fact of the entire inability of his fleet to cope with that of the Greeks, Xerxes made up his mind to return with all haste to Asia. From over-confidence he fell into the opposite extreme of despair, and made no effort to retrieve his ill fortune. His fleet was ordered to sail straight for the Hellespont, and to guard the bridges until he reached them with his army. He himself retreated hastily along the same road by which he had advanced, his whole army accompanying him as far as Thessaly, where Marnonius was left with 260,000 picked men, to prevent pursuit, and to renew the attempt against Greece in the ensuing year. Xerxes pressed on to the Hellespont, losing vast numbers of his troops by famine and sickness on the way, and finally returned into Asia, not by his magnificent bridge, which a storm had destroyed, but on board a vessel, which, according to some, narrowly escaped shipwreck during the passage. Even in Asia disaster pursued him. Between Abydos and Sardis his army suffered almost as much from over-indulgence as it had previously suffered from want; and of the mighty host which had gone forth from the Lydian capital in the spring not very many thousands can have re-entered it in the autumn. Still, however, there was a possibility that the success which his own arms had failed to achieve might reward the exertions of his lieutenants. Mardonius had expressed himself confident that with 300,000 picked soldiers he could overpower all resistance, and make Greece a satrapy of Persia. Xerxes had raised his forces to that amount by sending Artabazus back from Sestos at the head of a _corps d’armee_ numbering 40,000 men. The whole army of 300,000 wintered in Thessaly; and Mardonius, when spring came, having vainly endeavored to detach the Athenians from the Grecian ranks, marched through Boeotia in Attica, and occupied Athens for the second time. Hence he proceeded to menace the Peloponnese, where he formed an alliance with the Argives, who promised him that they would openly embrace the Persian cause. At the same time the Athenians, finding that Sparta took no steps to help them, began to waver in their resistance, and to contemplate accepting the terms which Mardonius was still willing to grant them. The fate of Greece trembled in the balance, and apparently was determined by the accident of a death and a succession, rather than by any wide-spread patriotic feeling or any settled course of policy. Cleombrotus, regent for the young son of Leonidas, died, and his brother Pausanias--a brave, clever, and ambitious man--took his place. We can scarcely be wrong in ascribing--at least in part--to this circumstance the unlooked-for change of policy, which electrified the despondent ambassadors of Athens almost as soon as Pausanias was installed in power. It was suddenly announced that