The Lord of the Rings: The War of the Rohirrim

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The first Lord of the Rings Anime film.

A sudden attack by Wulf, a ruthless Dunlending lord, forces Helm Hammerhand and his people to make a daring last stand in the ancient stronghold of the Hornburg. Finding herself in an increasingly desperate situation, Helm's daughter, Héra, must lead the resistance against a deadly enemy who's intent on total destruction.