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When the Persian King Darius is slain during his charge to conquer Greece, a far greater threat is born. Fueled by revenge and manipulated by his rancorous commander Artemisia (Eva Green), Darius' son Xerxes (Rodrigo Santoro) transforms himself into the "god king" and rallies Persia's titanic army in a new campaign to destroy the city-states. Though vastly outnumbered, Athenian admiral Themistocles (Sullivan Stapleton) uses superior military strategies to triumph over the initial nautical onslaught from the Persians, but he soon realizes that without the aid of Sparta's elite warriors, all of Greece may fall.

How to Watch 300: Rise of an Empire Legally and Safely

If you want to stream 300: Rise of an Empire through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry 300: Rise of an Empire films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.