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The information in this article comes from Disneys John Carter and is not written by Edgar Rice Burroughs.

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The Aoolian Plain is where John Carter was confronted by a massive horde of Warhoon savages.  He fought the horde, distracting them long enough to allow Dejah Thoris and Sola to escape. It is bordered by the River Iss and near the Gates of Iss.