The Macedonian general, Parmenio, wins a great victory over the Illyrians. King Philip II of Macedon, having disposed of an Illyrian threat, occupies the Athenian city of Amphipolis (which commands the gold mines of Mount Pangaion). Philip II now has control of the strategic city which secures the eastern frontier of Macedonia and gives him access into Thrace.
Philip II of Macedon marries Olympias, the Molossian princess of Epirus thus helping to stabilize Macedonia's western frontier.