In spring an army was assembled at Corinth to prevent the passage of the Thebans and their northern allies into Peloponnesus. But the superior abilities of the Theban leaders prevailed. They surprised an outpost. Doubting still their means for forcing their way over the rough descent of the Onean Mountains, they communicated with the Lacedæmonian polemarch commanding, and, whether through his treachery or his weakness, they obtained a truce, under favour of which they safely joined the forces of their Peloponnesian allies, the Arcadians, Argives, and Eleans. This junction being effected, they found themselves far superior to the army of the Lacedæmonian confederacy. Without opposition then they punished the attachment of the Epidaurians to the Lacedæmonian interest by ravage of their lands. They attempted then one of the gates of Corinth; but, the Corinthians submitting themselves to the able direction of the Athenian general, Chabrias, who was there with a body of mercenaries, they were repulsed with some slaughter. Against so great a superiority of force however the abilities of Chabrias could not prevent the ravage of the Corinthian territory. All Peloponnesus now seemed open to the Thebans, when the pressure of the Thessalian arms, under the tagus, Alexander of Pheræ, upon their northern allies, and apprehension of its extending to Bœotia itself, called the Thebans suddenly out of the peninsula. All the Peloponnesians of the confederacy then, assuming leave of absence, parted to their several homes.
The dissolution of the army of the Theban confederacy gave a most fortunate relief to Lacedæmon. All the leisure it afforded seems to have been wanted for composing troubles within Laconia itself. Offensive operations were left to the auxiliaries sent by Dionysius, then ruling in Syracuse; a body remarkable enough, both in itself and for its actions, to deserve notice. The infantry were Gauls and Spaniards; the cavalry, apparently Sicilian Greeks, so excellent that, though scarcely exceeding fifty horsemen, they had given more annoyance to the Thebans, while laying waste the Corinthian lands, than all the rest of the army. After the other troops, on both sides, were withdrawn, this transmarine force alone undertook the invasion of Sicyonia, defeated the Sicyonians in battle, and took a fort in their territory by assault. Gratified then with glory and plunder they embarked, and, with twenty triremes, their convoy, returned to Syracuse.
Thus far the able leaders of the Theban councils, profiting from the animosity so extensively prevailing against Lacedæmon, had kept their confederacy unanimous and zealous, under the supremacy of Thebes. But it was little likely that, by any management, so many states could be long retained in patient submission to so new a superiority. The long deference of the Grecian republics to Lacedæmonian command, amounting, in many instances, to a zealous, and sometimes extending to a general, loyalty towards the superior people, is a political phenomenon perhaps singular in the history of mankind. But that deference was paid to a superiority, not suddenly obtained, but growing from the extraordinary institutions under which the Lacedæmonians lived; which made them really a superior people, obviously fittest, in the divided and tumultuary state of the Greek nation, to command in war and to arbitrate in peace: whence even still, when the political power of Lacedæmon was so declining, the estimation of the Lacedæmonian people, we are told, was such that at the Olympian and other national meetings a Lacedæmonian was an object of curiosity and admiration for strangers, more even than the conquerors in the games. The superiority of Athens, also, though in few instances, or for a short time only, supported by a loyalty like that which Lacedæmon enjoyed, accruing suddenly, yet had resulted from long preparation. Legislation more perfected, talents and manners more cultivated, and an extraordinary succession of able men at the head of affairs, gave to the Athenians an effectual superiority which the people of other republics saw and felt. But Thebes, without any advantage of ancient prejudice in favour of her pretensions, without any public institutions to be admired, recently emerged from political subjection, possessing indeed a large and disciplined population which might infuse some terror, was yet become so suddenly eminent only through the blaze of talents of a few, and principally of one extraordinary man, leading her councils, and commanding her armies. If therefore, in any other state of the confederacy, where military force was not very inferior, a similar blaze of character should occur, that state would presently feel itself equal to Thebes, and be prepared to break a connection involving an admission of her superiority.
[368 B.C.]