John Carter, an American Civil War veteran, goes prospecting in Arizona and, when set upon by Indians, is mysteriously transported to Mars. Carter soon falls in among the Tharks, a nomadic tribe of the planet’s warlike, four-armed, green inhabitants. Thanks to his strength and combat abilities, he soon rises to a position of respect in the tribe, and meets the incomporable Deja Thoris: a princess of Mars.

A Princess of Mars

If we consider James Fenimore Cooper’s “Leatherstocking” tales to be proto-Westerns, then Edgar Rice Burroughs’ John Carter stories can be viewed as proto-Space-Westerns.