A Princess of Mars is the first novel in Edgar Rice Burroughs's famous "Barsoom" science fiction series. John Carter, a Confederate American Civil War veteran is mysteriously transported to Mars, called "Barsoom" by its inhabitants. Carter finds that he has great strength on this planet, due to its lesser gravity. 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 rises in position in the tribe and earns the respect and eventually the friendship of Tars Tarkas, one of the Thark chiefs.