 Complete the following phrase:  Philip II came to power when his older brother Perdiccas III of Macedon  was defeated and killed in battle by the forces of Bardylis. With the use of skillful diplomacy, Philip II was able to make peace with the Illyrians, Thracians, Paeonians, and Athenians who threatened his borders. This allowed him time to dramatically reform the Ancient Macedonian army, establishing the Macedonian phalanx that would prove crucial to his kingdoms success in subduing Greece, with the exception of Sparta. He gradually enhanced his political power by forming marriage alliances with foreign powers, destroying the Chalcidian League in the Olynthian War 349348 BC, and becoming an elected member of the Thessalian and Amphictyonic Leagues for his role in defeating Phocis in the 