"Windaria" (or "Douwa Meita Senshi Windaria" or "Once Upon a Time"), is a feature-length film from 1986 that depicts a world in which two kingdoms fight for possession of fresh water.

Windaria DVD box

Windaria (or Douwa Meita Senshi Windaira or Once Upon a Time), is a feature-length anime film from 1986 that depicts a world in which two kingdoms, Paro and Itha, fight for possession of fresh water. The movie was directed by Kunihiko Yuyama. The film is based on a novel of the same name written by Keisuke Fujikawa (also the script writer for the film).

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