The ruins of Persepolis evoke the best-known events of ancient Persia's history: Alexander the Great's defeat of Darius III, his conquest of the Achaemenid empire, and the burning of the great palace complex at Persepolis. However, most of the history of ancient Persia remains as mysterious today as it was to contemporary Western scholars. Compared to the world-famous Alexander, the many wars won by the Achaemenid, Parthian, and Sassanian empires, and their revolutionary military technology, have been almost forgotten in the sands of the East.