What made phillip such a successful military leader?

Philip was a master of diplomacy, alliances and military strength. He unified the Greek city-states who were often at war with each other using the traditional rivalries to divide and conquer.
He was also a great military leader with incredible foresight. He perfected the effectiveness of the Macedonian military system by professionalising his army, combining the cavalry and light infantry with a superior innovative phalanx and pike.