Bar Comas was the Jeddak of the Green Martian horde of Warhoons. He was killed in hand to hand combat by his lieutenant, Dak Kova, who then became Jeddak in his place. The conflict resulted from a disagreement over the fate of John Carter following his capture by the Warhoons, though Dak Kova had regarded Bar Comas as weak and unfit to rule and needed little excuse to usurp his position.