These fears were shared by the Thracians beyond the Strymon to the north, who inhabited the plains, such as the Panaeans, the Odomanti, the Droi and the Dersaeans, all of whom are independent.

It was even matter of conversation among the Hellenes who were enemies of Athens whether he might not be invited by his ally to advance also against them.

Meanwhile he held Chalcidice and Bottice and Macedonia, and was ravaging them all; but finding that he was not succeeding in any of the objects of his invasion, and that his army was without provisions and was suffering from the severity of the season, he listened to the advice of Seuthes, son of Sparadocus, his nephew and highest officer, and decided to retreat without delay. This Seuthes had been secretly gained by Perdiccas by the promise of his sister in marriage with a rich dowry.