King Darius III King Darius III Alexander Defeats the Persians, 331 BC ALEXANDER THE GREAT VS. THE PERSIANS شاهد عيان على التاريخ: الإسكندر يهزم الفرس، 331 ق.م the final battle with the Persian Empire Gaugamela Alexander Defeats the Persians 331 BC Alexander the Great defeated the Persians http://www.eyewitnesstohistory.com/alexander.htm