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.

But the Lacedaemonians, taking up the allies of the Arcadians that were present, invaded Mantinea, and encamping at the sanctuary of Heracles proceeded to ravage the country.

But the Argives and their allies, on seeing them, took up a position that was steep and difficult of access, and drew up for battle.