Shell Shock in World War I: The Origins of PTSD

World War I shell shock was not simply an earlier name for post-traumatic stress disorder (PTSD). It was a shifting category used by doctors and armies to explain tremors, paralysis, mutism, nightmares, anxiety and exhaustion in servicemen who often had no visible wound. Its history records medical progress, but also the moral limits of institutions primarily concerned with returning men to battle.

1915: naming an invisible wound

British physician Charles Myers used the term shell shock in The Lancet in 1915. The phrase initially implied physical damage from blast waves, yet similar symptoms soon appeared among soldiers who had not been close to an explosion. Debate moved among organic injury, psychological reaction and alleged failures of will.

A clinical experience, not one diagnosis

Case records from London’s National Hospital at Queen Square document motor syndromes, sensory loss and other functional neurological disorders. Different conditions sat beneath one label. Medical historians therefore caution against equating shell shock automatically with PTSD: classifications, social expectations and the expression of distress change over time.

Treatment, discipline and return to duty

Armies developed forward treatment based on proximity, immediacy and an expectation of recovery. Some patients improved; others faced coercive therapies or were interpreted through the language of cowardice and discipline. British military justice executed soldiers for offences including desertion and cowardice, although historians cannot retrospectively diagnose every individual case.

From combat trauma to PTSD

The Second World War used terms such as battle exhaustion, while later wars widened the study of trauma. PTSD entered the DSM-III formally in 1980 after decades of research and advocacy by veterans and other survivors. There is historical continuity, but it is not a straight line: the modern diagnosis uses criteria unavailable in 1915.