All this had been pleaded by the Theban orator before the five Spartan commissioners assembled to determine the fate of the captives after the surrender of Platæa; when he required the condemnation of the Platæans as guilty of treason to the ancestral institutions of Bœotia, and the Spartan commissioners had recognised the legitimacy of these institutions by a sweeping sentence of death against the transgressors. Moreover, at a time when the ascendency of Thebes over the Bœotian cities had been greatly impaired by her anti-Hellenic co-operation with the invading Persians, the Spartans themselves had assisted her with all their power to re-establish it, as a countervailing force against Athens. Epaminondas could show that the presidency of Thebes over the Bœotian cities was the keystone of the federation—a right not only of immemorial antiquity, but pointedly recognised and strenuously vindicated by the Spartans themselves. He could show further that it was as old, and as good, as their own right to govern the Laconian townships; which latter was acquired and held (as one of the best among their own warriors had boastfully proclaimed) by nothing but Spartan valour and the sharpness of the Spartan sword.
An emphatic speech of this tenor, delivered amidst the deputies assembled at Sparta, and arraigning the Spartans not merely in their supremacy over Greece, but even in their dominion at home, was as it were the shadow cast before by coming events. It opened a question such as no Greek had ever ventured to raise. It was a novelty startling to all—extravagant probably in the eyes of Callistratus and the Athenians, but to the Spartans themselves intolerably poignant and insulting. They had already a long account of antipathy to clear off with Thebes; their own wrong-doing in seizing the Cadmea; their subsequent humiliation in losing it and being unable to recover it; their recent short-comings and failures, in the last seven years of war against Athens and Thebes jointly. To aggravate this deep-seated train of hostile associations, their pride was now wounded in an unforeseen point, the tenderest of all. Agesilaus, full to overflowing of the national sentiment, which in the mind of a Spartan passed for the first of virtues, was stung to the quick. Had he been an Athenian orator like Callistratus, his wrath would have found vent in an animated harangue. But a king of Sparta was anxious only to close these offensive discussions with scornful abruptness, thus leaving to the presumptuous Theban no middle ground between humble retractation and acknowledged hostility. Indignantly starting from his seat, he said to Epaminondas: “Speak plainly,—will you, or will you not, leave to each of the Bœotian cities its separate autonomy?” To which the other replied, “Will you leave each of the Laconian towns autonomous?” Without saying another word, Agesilaus immediately caused the name of the Thebans to be struck out of the roll, and proclaimed them excluded from the treaty.
Such was the close of this memorable congress at Sparta in June 371 B.C. Between the Spartans and the Athenians, and their respective allies, peace was sworn. But the Thebans were excluded, and their deputies returned home, (if we may believe Xenophon) discouraged and mournful. Yet such a man as Epaminondas must have been well aware that neither his claims nor his arguments would be admitted by Sparta. If, therefore, he was disappointed with the result, this must be because he had counted upon, but did not obtain, support from the Athenians or others.
ATHENS ABANDONS THEBES