Fellow Wookie, Chewbacca, was captured by Trandoshan hunters, who left him stranded on Wasskah with other individuals to be hunted down and killed for sport. Chewbacca managed to send a transmission to Tarfful and the other Wookies and they arrive, saving the victims of the hunt with Bounty Hunters Sugi and Seripas.
Tarfful served as General under Jedi Masters Yoda and Luminara Unduli with Chewbacca on Kashyyyk to try and defeat the Separatist. Commander Gree and another Scout Trooper try to execute Yoda when Palpatine orders the activation of Order 66. Yoda senses their betrayal and kills them. Tarfful and Chewbacca help Yoda escape in a pod.