He sat on a throne atop a cliff while watching his navy lose at (*) Salamis [sal-ah-miss].
This ruler left Mardonius in charge of an army in Greece that would be defeated at Plataea. This ruler's navy took part in the Battle of Artemisium while his army defeated Greek forces led by King Leonidas. He sat on a throne atop a cliff while watching his navy lose at (*) Salamis [sal-ah-miss]. The son of Darius the Great, for 10 points, name this Persian emperor who won the Battle of Thermopylae [ther-mop-uh-lye] but lost the Greco-Persian Wars.
This ruler left Mardonius in charge of an army in Greece that would be defeated at Plataea.
Xerxes the Great (accept Xerxes I)