Xerxes I, or Xerxes the Great, was the ruler of the Achaemenid Empire during the Greco-Persian Wars and ally of the Order of the Ancients. He was killed by Artabanus/Darius and the first to be killed by a hidden blade.
In 1519 AD, during the Conquest of Tenochtitlan, a young Mexica warrior named Tototl finds out that the Spanish conquistadors are manipulated by the Templar Order but Tototl joins the Assassins to put an end to his people's suffering.