Events proved that Pericles was right in confining the Athenian empire to Greece. First of all Euboea revolted, and he was obliged to lead an army to subdue that island. Shortly after this, news came that the Megarians had become hostile, and that an army, under the command of Plistoanax, king of the Lacedaemonians, was menacing the frontier of Attica. Pericles now in all haste withdrew his troops from Euboea, to meet the invader. He did not venture on an engagement with the numerous and warlike forces of the enemy, although repeatedly invited by them to fight: but, observing that Plistoanax was a very young man, and entirely under the influence of Cleandrides, whom the _ephors_ had sent to act as his tutor and counsellor because of his tender years, he opened secret negotiations with the latter, who at once, for a bribe, agreed to withdraw the Peloponnesians from Attica. When their army returned and dispersed, the Lacedaemonians were so incensed that they imposed a fine on their king, and condemned Cleandrides, who fled the country, to be put to death. This Cleandrides was the father of Gylippus, who caused the ruin of the Athenian expedition in Sicily. Avarice seems to have been hereditary in the family, for Gylippus himself, after brilliant exploits in war, was convicted of taking bribes, and banished from Sparta in disgrace. When Pericles submitted the accounts of the campaign to the people, there was an item of ten talents, "for a necessary purpose," which the people passed without any questioning, or any curiosity to learn the secret. Some historians, among whom is Theophrastus the philosopher, say that Pericles sent ten talents annually to Sparta, by means of which he bribed the chief magistrates to defer the war, thus not buying peace, but time to make preparations for a better defence. He immediately turned his attention to the insurgents in Euboea, and proceeding thither with a fleet of fifty sail, and five thousand heavy armed troops, he reduced their cities to submission. He banished from Chalcis the "equestrian order," as it was called, consisting of men of wealth and station; and he drove all the inhabitants of Hestiaea out of their country, replacing them by Athenian settlers. He treated these people with this pitiless severity, because they had captured an Athenian ship, and put its crew to the sword. After this, as the Athenians and Lacedaemonians made a truce for thirty years, Pericles decreed the expedition against Samos, on the pretext that they had disregarded the commands of the Athenians to cease from their war with the Milesians.