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 Potidaeans and the Peloponnesians under Aristeus were awaiting the Athenians, encamped on the Olynthian side of the isthmus; and they had established a market outside of the city.

The allies had chosen Aristeus general of all the infantry, and Perdiccas of the cavalry; for Perdiccas had immediately deserted the Athenians again[*](For his first desertion of the Athenians, see Thuc. 1.57.) and was now in alliance with the Potidaeans, having appointed Iolaus as his administrator at home.