History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

The Lacedaemonians proceeded to ravage the land of the Parrhasians, and the Mantineans, giving over the custody of their city to the Argives, tried themselves to guard the territory of their Parrhasian allies. Being unable, however, to save the fort at Cypsela and the towns in Parrhasia, they withdrew.

And the Lacedaemonians, after making the Parrhasians independent and pulling down the fort, then returned home.