The incorporation of peace and war into the curriculum poses problems to teachers, especially in an examination-focussed school system. Whilst recent research concerning conflict has considered conflict-resolution within schools, and difficulties teachers face teaching about terrorism, little has been written on teaching 21st century war without the high-profile deployment of UK troops. In this article, I examine how peace and war are taught in an English school. After identifying the school's overall war-focussed discourse, I focus on the practices of an ex-services English teacher and his techniques to debate, discuss, and ultimately problematise war creating a space akin to Foucault's heterotopia. I argue this 'other space' allowed him to develop his practice and there is evidence of the heterotopia 'leaking' further afield. I suggest that although there are limitations to the classroom-as-heterotopia, it can nevertheless provide a space for practitioners to disrupt the wider discourse within their schools.