300: "300" is a ferocious retelling of the ancient Battle of Thermopylae in which King Leonidas and 300 Spartans fought to the death against Xerxes and his massive Persian army. 300: RISE OF AN EMPIRE: This new chapter of the epic "300" saga takes the action to the sea, where Greek general Themistokles battles invading Persian forces led by Xerxes and the naval commander Artemisia.