This is the first mention the novel makes of the genocide on Speer, an island inhabited by people who are “ethnically and culturally different” from the rest of the Nikara. And notably, rather than discussing how much of a tragedy such a genocide would be, Yim and the boy frame the genocide as just another calculation powerful people made in order to win a war. This speaks to how horrific war is, and how fighting a war necessarily entails fighting powers dehumanizing their enemies (or their disposable minorities). Then, Yim also makes it clear that students, too, will learn to engage in this kind of dehumanization, as Nikan is preparing for another war with the Federation of Mugen. This is a war Rin and her classmates will fight in, if they don’t actually lead it.