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.

Moreover, he brought about a reconciliation between Perdiccas and the Athenians, whom he persuaded to restore Therme[*](Thuc. 1.61.2.) to him. Perdiccas immediately joined forces with the Athenians under Phormio[*](Thuc. 1.64.2; Thuc. 1.65.3.) and took the field against the Chalcidians.

It was in this way that Sitalces son of Teres, king of the Thracians, became an ally of the Athenians, and also Perdiccas son of Alexander, king of the Macedonians.