 Complete the following phrase:  He may have been of Elamite origin, although his son, Oxathres Gatha Avestan: Huxšathra, bears an Iranian name, one that seems distinctly Zoroastrian. After the Battle of Gaugamela 331 BC, the Mesopotamian province of the Achaemenid Empire quickly fell to Alexander. Thereafter, Abulites had no choice but to surrender nearby Susa. After entering Susa, Alexander captured a vast collection of treasure, including 50,000 talents of silver in ingots. Treasure from Xerxes 