While Sitalces was engaged in these operations, the Thessalians, Achaeans, Magnesians, and all the other Greeks dwelling between Macedonia and Thermopylae took counsel together and united in raising a considerable army; for they were apprehensive lest the Thracians with all their myriads of soldiers should invade their territory and they themselves should be in peril of losing their native lands. [2] Since the Chalcidians made the same preparations, Sitalces, having learned that the Greeks had mustered strong armies and realizing that his soldiers were suffering from the hardships of the winter, came to terms with Perdiccas, concluded a connection by marriage with him,1 and then led his forces back to Thrace.