WARNING!!! NON-CANON!!! The information in this article comes from New Adventures on Barsoom and is not written by Edgar Rice Burroughs. Harkan Thul is an arrogant green martian, a member of the horde of Warhoon. Retrieved from "https://barsoom.fandom.com/wiki/Harkan_Thul?oldid=9701" Categories: Characters (non-canon) Green Martians (non-canon) Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.