Another expedition under Cimon; and victory by sea and land near the Eurymedon, B. C. 469. He takes possession of the Hellespontine Chersonesus, 468. Some of the Athenian confederates already endeavour to secede. Hence, 467, the conquest of Caristus in Euboea; subjection of Naxos, 466, and from 465-463, siege and capture of Thasos, under Cimon. The Athenians endeavour to obtain a firmer footing on the shore of Macedonia; and for that purpose send out a colony to Amphipolis, 465. Great earthquake at Sparta; gives rise to a ten years' war, viz. the third Messenian war or revolt of the Helots, who fortify themselves in Ithome, 465-455: in this war the Athenians, at the instigation of Cimon, send assistance to the Spartans, 461, who refuse the proffered aid. The democratic party seize the opportunity of casting on Cimon the suspicion of being in the interest of Sparta; he is banished by ostracism, 461. 13. The death of Aristides, and the banishment of Cimon, concur in elevating Pericles to the head of affairs; a statesman whose influence had begun to operate as early as 469. Less a general than a demagogue, he supported himself in authority during forty years, until the day of his death, and swayed Athens without being either archon or member of the areopagus. That under him the constitution must have assumed a more democratic character, is demonstrated by the fact of his exaltation as leader of the democratic party. The aristocrats, however, contrive until 444 to set up rivals against him in the persons of the military leaders, Myronides, Tolmidas, and more particularly the elder Thucydides. Change in the spirit of administration under Pericles, both in reference to internal and external relations. A brilliant management succeeds to the parsimonious economy of Aristides; and yet, after the lapse of thirty years, the state treasury was full.--Limitation of the power of the areopagus by Ephialtes, B. C. 461. The withdrawal of various causes which formerly came under the jurisdiction of that tribunal must have diminished its right of moral censorship.--Introduction of the practice of paying persons who attended the courts of justice. With regard to external relations, the precedence of the Athenians gradually advanced toward supremacy; although their relations with all the confederates were not precisely the same. Some were mere confederates; others were subjects.--Augmentation in the imposts on the confederates, and transfer of the treasury from Delos to Athens, 461. The jealousy of Sparta and the discontent of the confederates keep pace with the greatness of Athens. Unsuccessful attempt to support by the help of an Athenian fleet and troops, Inarus of Egypt in his insurrection against the Persians, 462-458.