Philip II of Macedon

Philip II reorganized the Macedonian army, introducing the sarissa (long pike) and the phalanx formation. He also improved cavalry tactics and logistics, creating a professional, disciplined force that was superior to Greek hoplite armies.

Philip II led the Macedonian army to a decisive victory over the combined forces of Athens and Thebes at Chaeronea. The battle ended Greek independence and established Macedonian hegemony over Greece. Philip's son Alexander commanded the cavalry on the left wing.

Philip II established the League of Corinth, a federation of Greek states under Macedonian leadership. The league declared war on Persia and appointed Philip as its commander-in-chief, laying the groundwork for Alexander's later invasion.

Philip II was assassinated by his bodyguard Pausanias at the wedding of his daughter Cleopatra in Aegae. The motive remains unclear, but his death led to the immediate succession of his son Alexander the Great, who continued his plans for the Persian invasion.