 During the Peloponnesian War, the Argilians readily joined the Spartan general Brasidas in his Chalcidian expedition in 424 BCE, on account of their jealousy of the important city of Amphipolis, which the Athenians had founded in their neighbourhood.The treaty establishing the Peace of Nicias, in 421 BCE, respected the neutrality of Argilus, Stageirus, Acanthus, Olynthus, Scolus, and Spartolus.Its site is located southwest of Nea Kerdylia, near modern Argilos.