Definition of Xerxes I in English:
Xerxes I
proper nounˈzəːksiːzˌzərksēz T͟Həˈfərst
(c.519–465 BC), son of Darius I, king of Persia 486–465. His invasion of Greece achieved victories in 480 at Artemisium and Thermopylae, but defeats at Salamis (480) and Plataea (479) forced him to withdraw.
Definition of Xerxes I in US English:
Xerxes I
proper nounˌzərksēz T͟Həˈfərst
(c.519–465 BC), son of Darius I; king of Persia 486–465. He continued his father's attack on the Greeks but was forced to withdraw after defeats at Salamis in 480 and Plataea in 479.