Genre-Bending in The Armies of the Night

How does Norman Mailer define the terms “novel” and “history” in the context of his literary journalism? Literary journalism is certainly the only generic label that completely fits. Further, if we take the text to be a work of New Journalism, then what part is journalism, as opposed to what parts are fiction and history, and how do we distinguish among the genres? Mailer configures all three genres in remarkably original ways.