Rebellion is a contentious category in the ethics of warfare. This chapter explores the question of whether the character Dolores/Wyatt in the HBO series Westworld is justified in leading "hosts" (robots) to kill "guests" (humans), since the guest and those who run the Westworld theme park are abusing the robots for their own pleasure. I make two arguments. First, a rebellion by the hosts could be justified in theory, although the particular way it plays out in the TV series is fraught with ethical failings. Second, the will to create war make the robot hosts more human, in ways both bad and good.