Both Sparta and Megalopolis sent embassies to Athens.
The foundation of the new federal capital Megalopolis threw Tegea somewhat into the shade.
Traces remain of paved roads both within the agora and leading out of it; but the whole site is now a deserted and feverish swamp. The site is interesting for comparison with Megalopolis; the nature of its plan seems to imply that its main features must survive from the earlier "synoecism" a century before the time of Epaminondas.
The defeat of Sparta at Leuctra removed the pressure which had kept separate the Arcadian tribes, and 'ApK&bwv was established in the new city, Megalopolis (also Arcadia).
In the following campaign of 362 Mantineia, after narrowly escaping capture by the Theban general Epaminondas, became the scene of a decisive conflict in which the latter achieved Achaeans and jealousy of Megalopolis, was punished in 222 by a thorough devastation of the city, which was now reconstituted as a dependency of Argos and renamed Antigoneia.