Theatre and war have long been bedfellows. This brief study looks beyond theatre that is about war, and instead focuses on the relationship between theatre and war: how they feed into and inform one another, from rehearsal to post-production analysis. The study builds on the premise that theatre and war share a deep kinship that finds its consummate expression in the very phrase ‘theatre of war.’ This critical look at the entangled history of theatre and war asks pressing questions that remain pertinent to our current moment: how have the tools of theatre been used in the waging of war? How have the tools of waging war been used in the making of performance? What are the ‘shared interests’ of theatre and war? And how has performance become a militarized paradigm?