King of Macedonia, 336-323 BCE. Son of Philip II, who moved Macedonia into power following Pelop. War. Est. League of Corinth (allies) with most Greece (not Sparta). Respected Gk cultural achievements, wanted to lead Gks, not conquer. Assass'd and Alexander in power. AG: lightning campaign of conquest (10 yrs, world largest empire). Asia Minor, Levant, Syria, Egypt, Fertile Crescent, Persia, east to Pakistan across Indus R. Men mutiny, turns back. Died in Babylon.