After succeeding his father to the throne, Alexander became one of the most successful military leaders in ancient history, conquering most of … Alexander the Great was born in July 365 BCE in Pella, the capital of Ancient Macedonia, which now sits within modern Greece. After securing Macedonian control over Greece, which had been shaken by Philip’s assassination, he went on the conquer the mighty Persian empire, and would go down in history as Alexander the Great. Alexander the Great, also known as Alexander III or Alexander of Macedonia, (born 356 bce, Pella, Macedonia [northwest of Thessaloníki, Greece]—died June 13, 323 bce, Babylon [near Al-Ḥillah, Iraq]), king of Macedonia (336–323 bce), who overthrew the Persian empire, carried Macedonian arms to India, and laid the foundations for the Hellenistic world of territorial kingdoms.