Xerxes the Great (519 BC-465 BC), was the fourth king of the Achaemenid Empire. He was the grandson of Cyrus and the son of Darius. He is best known for his massive invasion of Greece from across the Hellespont (480 bce), a campaign marked by the battles of Thermopylae, Salamis, and Plataea.
Darius then died whilst preparing to march on Egypt, and the throne of Persia passed to his son Xerxes I. Xerxes crushed the Egyptian revolt, and very quickly restarted the preparations for the invasion of Greece. The epic second Persian invasion of Greece finally began in 480 BC, and the Persians met with initial success at the battles of Thermopylae and Artemisium-Persepolis, Iran
Xerxes I, Old Persian Khshayarsha, byname Xerxes the Great (born c. 519 bce—died 465, Persepolis, Iran), Persian king (486–465 bce), the son and successor of Darius I. He is best known for his massive invasion of Greece from across the Hellespont (480 bce), a campaign marked by the battles of Thermopylae, Salamis, and Plataea. His ultimate defeat spelled the beginning of the decline of the Achaemenian Empire.
Xerxes I (ruled 486-465 BCE), also known as Xerxes the Great, was the king of the Persian Achaemenid Empire. His official title was Shahanshah which, though usually translated as `emperor’, actually means `king of kings’. He is identified as the Ahasuerus of Persia in the biblical Book of Esther