Philip II

(born 382—died 336 BC, Asia Minor) Eighteenth king of Macedonia (359–336), father of Alexander the Great. Appointed regent for his nephew, he seized the throne. He initially promoted peace with his neighbours, using the time gained thereby to build his forces and introducing innovations in arms, tactics, and training and stabilizing his western frontier. His movements on the eastern frontier provoked the Greeks into forming a coalition against him. He intervened in the Sacred War to free Delphi from the Phocians, becoming the ally of Thebes and the Thessalian League, whose president he became. Demosthenes turned Athens against him with his Philippics (346–342), and Thebes also came to view Philip as a threat. He defeated both at the Battle of Chaeronea, becoming leader of all Greece. He formed the Greek states into the League of Corinth to attack Persia but was undone by family politics. After he took a second wife, his first wife, Olympias, left him, taking Alexander. Philip was assassinated by a Macedonian nobleman, possibly in collusion with Olympias and Alexander.