Upon his accession to the Macedonian throne in 360 BC, Philip had to contend with numerous enemies, both without and within his kingdom.
After dispatching the five other pretenders to the throne -- in particular Argaios who enjoyed the support of the Athenians -- Philip crushed the Paiones and then the Illyrians, thus definitively establishing Upper (present-day Western) Macedonia as a province of his kingdom. An alliance with the Aleuadai of Larisa and approaches made to the Molossians, who occupied part of Orestis, resulted in the formation of a single cohesive Macedonian state whose western borders reached to the Pindos range and Lake Lychnitis (present-day Ochrid).
Meanwhile the capture of Poteidaia, Pydna and Methone -- cities which were allied to Athens -- and Philip's victory over his opponents' alliance extended the eastern borders of his kingdom to the Strymon. Upon the re-establishment of the city of Philippi (ancient Krenides) both the gold and silver mines of Mount Pangaion and forests with shipbuilding timber stretching to the Nestos passed into his possession.