Such a character had been for some time rising among the Arcadians in Lycomedes of Mantinea, a man inferior to none of his country in birth, superior to most in property, one who had already distinguished himself in council as a principal promoter of the Arcadian union, and in arms at the head of the Arcadian forces. Lycomedes apparently already saw, what afterwards became abundantly notorious, that, if any view to the general good of Greece influenced the Theban councils, it was wholly subordinate to the ambition of making Thebes supreme over the Greek nation. This ambition he resolved to oppose. In the general assembly therefore of the Arcadian states, convened in the new city of Megalopolis, he represented that “Peloponnesus, among all its various present inhabitants, was the proper country of the Arcadians alone; the rest were really strangers. Nor were the Arcadians the most ancient only, they were the most powerful of the Grecian tribes; they were the most numerous, and they excelled in strength of body. It was notorious that the troops of no other Grecian people were in equal request. The Lacedæmonians knew their value: they had never invaded Attica without Arcadian auxiliaries; nor would the Thebans now venture to invade Laconia without them. If therefore the Arcadians knew their own interest, they would no longer obey the Thebans, but insist upon equality in command. They had formerly raised Lacedæmon; they were now raising Thebes; and shortly they would find the Thebans but other Lacedæmonians.”
Flattering thus alternately, and stimulating the Arcadian people, Lycomedes obtained the effective command of them; and the natural consequence of the submission of the multitude’s caprice to an able man’s control resulted: the Arcadians were successful, and their successes were brilliant. The Argives invaded Epidauria. The renowned Athenian general Chabrias, at the head of the Athenian and Corinthian forces, intercepted their retreat. The Arcadians were in alarm for their allies; an assembly was held; the interest of Lycomedes decided the choice of commanders, and the Arcadian army, against great disadvantage of ground, brought off the Argives without loss. An expedition was then undertaken into Laconia; the territory of Asine was ravaged, and the Lacedæmonian polemarch Geranor, who commanded there, was defeated and killed. Many predatory incursions, in the common way of Grecian warfare, followed; and when any object invited, neither night, says the contemporary historian, nor weather, nor distance, nor difficulty of way deterred; insomuch that the Arcadians acquired the reputation of being the best soldiers of their time.
Disposed as the Arcadians showed themselves no longer to admit the superiority of Thebes, their strength, their discipline, and their successful activity in arms, though exerted in the cause of the confederacy, could scarcely fail to excite some jealousy and apprehension in the Theban government. No direct breach ensued, but friendship cooled and became precarious. Meanwhile the new energy of the Arcadian government attracted the regard of the humble and oppressed; always an extensive description of men, and sometimes of states, among the Grecian republics. The people of Elis had long claimed, and generally maintained, a sovereignty over the people of several towns of Elis, and of the whole district called Triphylia, on the border against Messenia. In a strong situation in Triphylia, called Lasion, to assist in curbing the inhabitants they had allowed some Arcadian exiles to establish themselves. They at length made common cause with their neighbouring fellow-subjects, particularly the Marganeans and Scilluntines, in opposition to the Elean government. For support then they turned their view to the new union of Arcadia: they claimed to be Arcadians; and by a petition addressed to the new united government they desired to be taken under its protection. At the same time the Eleans were pressing for assistance from their allies of Arcadia, to recover their former dominion over the towns which the Lacedæmonians had restored to independency. The Arcadians slighted this application, and declared by a public resolution that the petition of the Triphylians was well founded, and that their kinsmen should be free. Elis became in consequence still more alienated from Arcadia than Arcadia from Thebes.