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Rh THE PELOPONNESIAN WAR: THE SPARTAN AND THE THEBAN SUPREMACY.

Causes of the War.—During the closing years of the life of Pericles, the growing jealousy between Athens and Sparta broke out in the long struggle known as the Peloponnesian War. Pericles had foreseen the coming storm: "I descry war," said he, "lowering from the Peloponnesus." His whole later policy looked toward the preparation of Athens for the "irrepressible conflict."

The immediate causes of the war were, first, the interference of Athens, on the side of the Corcyræans, in a quarrel between them and their mother city Corinth; and secondly, the blockade by the Athenians of Potidæaea, on the Macedonian coast. This was a Corinthian colony, but it was a member of the Delian league, and was now being chastised by Athens for attempted secession. Corinth, as the ever-jealous naval rival of Athens, had endeavored to lend aid to her daughter, but had been worsted in an engagement with the Athenians.

With affairs in this shape, Corinth, seconded by other states that had causes of complaint against Athens, appealed to Sparta, as the head of the Dorian alliance, for aid and justice. The Spartans, after listening to the deputies of both sides, decided that the Athenians had been guilty of injustice, and declared for war. The resolution of the Spartans was endorsed by the Peloponnesian confederation, and apparently approved by the Delphian oracle, which, in response to an inquiry of the Spartans as to what would be the issue of the proposed undertaking, assured them that "they would gain the victory, if they fought with ail their might."