John Carter, the Confederate soldier transported to distant Mars, must save his adopted world from an adversary who is every bit his equal on the Red Planet: Captain Joshua Clark, formerly of the Army of the Potomac and now the strategist for a species of star-hopping conquerors. While Carter and his staunch ally, the Thark chieftain Tars Tarkas, lead a legion of united Green Men and Red Men against the alien assailants, Dejah Thoris -- the princess...