Conqueror and King of Macedonia, Alexander the Great was born July 20, 356 B.C. in Pella, Macedonia. During his leadership, he united the Greek city-states and led the Corinthian League. He also became the king of Persia, Babylon and Asia, and created Macedonian colonies in Iran. While considering the conquests of Carthage and Rome, Alexander died of malaria in Babylon on June 13, 323 B.C.