Nausicaä of the Valley of the Wind Vol. 3 (manga)

Nausicaä finds herself on the edge of despair as she comes to realize the full extent of the ecological destruction that's ravaging Earth. Meanwhile, Queen Kushana of Torumekia plots to lead her troops back to the imperial capital and seize the crown. Nausicaä agrees to join Kushana and her people in the fight against the Doroks and her scheming brothers.