Hard-boiled writer Raymond Chandler created his detective Philip Marlowe not as the idealisation of heroic individualism as is commonly perceived, but as an authentic individual subjected to real psychological frailties resulting from his traumatic experiences during World War One. Marlowe’s characterisation goes beyond the traditional chivalric readings and can instead be interpreted as an authentic representation of a traumatised veteran in American society. Substituting the horror of the trenches for the corruption of the city, Chandler’s disillusioned protagonist and his representation of an uncaring American society resonate strongly with the dislocation of the Lost Generation. Consequently, it is profitable to consider Chandler as both a generic writer and a genuine literary figure. This book re-examines important primary documents highlighting extensive discrepancies in existing biographical narratives of Chandler’s war experience, and unveils an account that is significantly different from that of his biographers. Utilizing psychological behavioural interpretation to interrogate Chandler’s novels demonstrates the variety of post-traumatic symptoms that tormented Chandler and his protagonist. A close reading of his personal papers reveals the war trauma subconsciously encoded in Marlowe’s characterisation. This conflation of the hard-boiled style and war experience – a war noir – has influenced many contemporary crime writers, particularly in the traumatic aftermath of the Vietnam War. This work offers a new understanding of Chandler’s traumatic war experience, how that experience established the traditional archetype of detective fiction, and how this reading of his work allows Chandler to transcend generic limitations to be recognised as a key twentieth century literary figure.