There he assembled all the Greeks who were within the limits of Peloponnesus, and asked from them the supreme command of the expedition against the Persians, an office which they had already conferred upon Philip. It is said that Philip died when Pythodelus was archon at Athens, and that his son Alexander, being then about twenty years of age, marched into Peloponnesus as soon as he had secured the regal power. § 1.1.1 DEATH OF PHILIP and ACCESSION OF ALEXANDER - HIS WARS WITH THE THRACIANS