Greeve, holding the rank of Lieutenant, fought alongside Han Solo as part of the Rebel Alliance's strike team under the command of General on the forest moon of Endor during the Galactic Civil War.
Before joining General Crix Madine's commando unit, he served as a forest guide on Kashyyyk, where he was identified and recruited. Furthermore, equipped with a rifle acquired from BlasTech Industries through Corporal Janse, he demonstrated exceptional skill as a sharpshooter.