Patrick O'Sullivan is an Irish-British scholar and author of major works in the field of Military geography. He is the author of the oft-cited texts The Geography of Warfare and The Geography of War in the Post-Cold War World. Though the former was published in 1983 and the latter in 2001, these works remain the seminal texts of Military geography from a civilian publisher, due in large part to the present lack of interest in the subfield among geographers, aside from a small handful who critique militarization through critical theory.