Cimon was countenanced by the Lacedaemonians in opposition to Themistocles, whom they disliked; and while he was yet very young, they endeavored to raise and increase his credit in Athens. This the Athenians perceived at first with pleasure, and the favor the Lacedaemonians showed him was in various ways advantageous to them and their affairs; as at that time they were just rising to power, and were occupied in winning the allies to their side. So they seemed not at all offended with the honor and kindness showed to Cimon, who then had the chief management of all the affairs of Greece, and was acceptable to the Lacedaemonians, and courteous to the allies. But afterwards the Athenians, grown more powerful, when they saw Cimon so entirely devoted to the Lacedaemonians, began to be angry, for he would always in speeches prefer them to the Athenians, and upon every occasion, when he would reprimand them for a fault, or incite them to emulation, he would exclaim, "The Lacedaemonians would not do thus." This raised the discontent, and got him in some degree the hatred of the citizens;but that which ministered chiefly to the accusation against him fell out upon the following occasion.
In the fourth year of the reign of Archidamus, the son of Zeuxidamus, king of Sparta, there happened in the country of Lacedaemon, the greatest earthquake that was known in the memory of ma; the earth opened into chasms, and the mountain Taygetus was so shaken that some of the rocky points of it fell down, and except five houses, all the town of Sparta was shattered to pieces. They say that a little before any motion was perceived, as the young men and the boys just grown up were exercising themselves together in the middle of the portico, a hare, of a sudden, started out just by them, which the young men, though all naked and daubed with oil, ran after for sport. No sooner were they gone from the place, than the gymnasium fell down upon the boys who had stayed behind, and killed them all. Their tomb is to this day called Sismatias.* Archidamus, by the present danger made apprehensive of what might follow, and seeing the citizens intent upon removing the most valuable of their goods out of their houses, commanded an alarm to be sounded, as if an enemy were coming upon them, in order that they should collect about him in a body, with arms. It was this alone that saved Sparta at that time, for the Helots had come together from the country about, with design of surprising the Spartans, and overpowering those whom the earthquake had spared. But finding them armed and well prepared, they retired into the towns and openly made war with them, gaining over a number of the Laconians of the country districts; while at the same time the Messenians, also, made an attack upon the Spartans, who therefore despatched Periclidas to Athens to solicit succor, of whom Aristophanes says in mockery that he came andIn a red jacket, at the altars seated, With a white face, for men and arms entreated.
This Ephialtes opposed, protesting that they ought not to raise up or assist a city that was a rival to Athens; but that being down, it were best to keep her so, and let the pride and arrogance of Sparta be trodden under. But Cimon, as Critias says, preferring the safety of Lacedaemon to the aggrandizement of his own country, so persuaded the people, that he soon marched out with a large army to their relief. Ion records, also, the most successful expression which he used to move the Athenians. "They ought not to suffer Greece to be lamed, nor their own city to be deprived of her yoke fellow."In his return from aiding the Lacedaemonians, he passed with his army through the territory of Corinth; whereupon Lachartus reproached him for bringing his army into the country, without first asking leave of the people. For he that knocks at another man's door ought not to enter the house till the master gives him leave. "But you, Corinthians, O Lachartus," said Cimon, "did not knock at the gates of the Cleonaeans and Megarians, but broke them down and entered by force, thinking that all places should be open to the stronger." And having thus rallied the Corinthian, he passed on with his army. Some time after this, the Lacedaemonians sent a second time to desire succor of the Athenians against the Messenians and Helots, who had seized upon Ithome. But when they came, fearing their boldness and gallantry, of all that came to their assistance, they sent them only back, alleging that they were designing innovations. The Athenians returned home, enraged at this usage, and vented their anger upon all those who were favorers of the Lacedaemonians; and seizing some slight occasion, they banished Cimon for ten years, which is the time prescribed to those that are banished by the ostracism. In the mean time, the Lacedaemonians, on their return after freeing Delphi from the Phocians, encamped their army at Tanagra, whither the Athenians presently marched with design to fight them.