Why was Philip ruler of a relatively less developed Macedon able to conquer the classical cities of mainland Greece

Philip II of Macedon’s most important innovations were the introduction of the Phalanx , a tightly knit group of infantry , which was equipped with the Sarissa which was an overly (13-21 feet) long spear . These two tactical innovations had strategic consequences for the nation of Macedon , himself and his son Alexander the Great .