History of the Peloponnesian War

The same summer the Lacedaemonians with their whole power, under the conduct of Pleistonanax, the son of Pausanias, king of the Lacedaemonians, made war upon the Parrhasians of Arcadia, subjects of the Mantineans, partly as called in by occasion of sedition and partly because they intended, if they could, to demolish a fortification which the Mantineans had built and kept with a garrison in Cypsela, in the territory of the Parrhasians towards Sciritis of Laconia.

The Lacedaemonians therefore wasted the territory of the Parrhasians. And the Mantineans, leaving their own city to the custody of the Argives, came forth to aid the Parrhasians their confederates; but being unable to defend both the fort of Cypsela and the cities of the Parrhasians too, they went home again.

And the Lacedaemonians, when they had set the Parrhasians at liberty and demolished the fortification, went home likewise.