History of the Peloponnesian War

They arrived in Macedonia first, and found the force of a thousand men that had been first sent out, just become masters of Therme and besieging Pydna.

Accordingly they also joined in the investment, and besieged Pydna for a while. Subsequently they came to terms and concluded a forced alliance with Perdiccas, hastened by the calls of Potidaea, and by the arrival of Aristeus at that place. They withdrew from Macedonia,