After consolidating the border of the Balkans and the Macedonian hegemony over the city-states of ancient Greece, ending the rebellion that occurred after the death of his father, Alexander crossed the Hellespont to Asia Minor (334 BC) and began the conquest of the Persian Empire, ruled by Darius III. Victorious in the battles of the Graánico (334 a. C.), Issos (333 a. C.), Gaugamela (331 a. C.) and of the Persian Door (330 a. C.), was done with a dominion that it extended by the Hélade, Egypt, Anatolia, the Middle East and Central Asia, to the Indus and Oxus rivers. Having advanced to India, where he defeated King Poro in the battle of the Hidaspes (326 BC), the refusal of his troops to continue towards the East forced him to return to Babylon, where he died without completing his plans to conquer the Arabian Peninsula. With the so-called «fusion policy», Alejandro promoted the integration of the peoples subject to Macedonian domination by promoting their incorporation into the army and favoring mixed marriages. He married two Persian women of noble birth.
