Shell shock Shell shock is the reaction of some soldiers in World War I to the trauma of battle . It is a reaction to the intensity of the bombardment and fighting that produced a helplessness appearing variously as panic , or flight , an inability to reason , sleep , walk or talk . " Simply put , after even the most obedient soldier had enough shells rain down on him , without any means of fighting back , he often lost all self control . " During the War , the concept of shell shock was ill - defined . Cases of " shell shock " could be interpreted as either a physical or psychological injury , or simply as a lack of moral fiber . While the term " shell shock " is no longer used in either medical or military discourse , it has entered into popular imagination and memory , and is often identified as the signature injury of the War . In World War II and thereafter , diagnosis of " shell shock " was replaced by that of combat stress reaction , a similar but not identical response to the trauma of warfare . Origin . During the early stages of World War I , soldiers from the British Expeditionary Force began to report medical symptoms after combat , including tinnitus , amnesia , headache , dizziness , tremor , and hypersensitivity to noise . While these symptoms resembled those that would be expected after a physical wound to the brain , many of those reporting sick showed no signs of head wounds . By December 1914 as many as 10 % of British officers and 4 % of enlisted men were suffering from " nervous and mental shock " . The term " shell shock " came into use to reflect an assumed link between the symptoms and the effects of explosions from artillery shells . The term was first published in 1915 in an article in " The Lancet " by Charles Myers . Some 60 – 80 % of shell shock cases displayed acute neurasthenia , while 10 % displayed what would now be termed symptoms of conversion disorder , including mutism and fugue . The number of shell shock cases grew during 1915 and 1916 but it remained poorly understood medically and psychologically . Some doctors held the view that it was a result of hidden physical damage to the brain , with the shock waves from bursting shells creating a cerebral lesion that caused the symptoms and could potentially prove fatal . Another explanation was that shell shock resulted from poisoning by the carbon monoxide formed by explosions . At the same time an alternative view developed describing shell shock as an emotional , rather than a physical , injury . Evidence for this point of view was provided by the fact that an increasing proportion of men suffering shell shock symptoms had not been exposed to artillery fire . Since the symptoms appeared in men who had no proximity to an exploding shell , the physical explanation was clearly unsatisfactory . In spite of this evidence , the British Army continued to try to differentiate those whose symptoms followed explosive exposure from others . In 1915 the British Army in France was instructed that : However , it often proved difficult to identify which cases were which , as the information on whether a casualty had been close to a shell explosion or not was rarely provided . Management . Acute . At first , shell - shock casualties were rapidly evacuated from the front line – in part because of fear of their unpredictable behaviour . As the size of the British Expeditionary Force increased , and manpower became in shorter supply , the number of shell shock cases became a growing problem for the military authorities . At the Battle of the Somme in 1916 , as many as 40 % of casualties were shell - shocked , resulting in concern about an epidemic of psychiatric casualties , which could not be afforded in either military or financial terms . Among the consequences of this were an increasing official preference for the psychological interpretation of shell shock , and a deliberate attempt to avoid the medicalisation of shell shock . If men were ' uninjured ' it was easier to return them to the front to continue fighting . Another consequence was an increasing amount of time and effort devoted to understanding and treating shell shock symptoms . By the Battle of Passchendaele in 1917 , the British Army had developed methods to reduce shell - shock . A man who began to show shell - shock symptoms was best given a few days ' rest by his local medical officer . Col . Rogers , RMO 4 / Black Watch wrote ; If symptoms persisted after a few weeks at a local Casualty Clearing Station , which would normally be close enough to the front line to hear artillery fire , a casualty might be evacuated to one of four dedicated psychiatric centres which had been set up further behind the lines , and were labelled as " NYDN – Not Yet Diagnosed Nervous " pending further investigation by medical specialists . Even though the Battle of Passchendaele generally became a byword for horror , the number of cases of shell - shock were relatively few . 5 , 346 shell shock cases reached the Casualty Clearing Station , or roughly 1 % of the British forces engaged . 3 , 963 ( or just under 75 % ) of these men returned to active service without being referred to a hospital for specialist treatment . The number of shell shock cases reduced throughout the battle , and the epidemic of illness was ended . During 1917 , " shell shock " was entirely banned as a diagnosis in the British Army , and mentions of it were censored , even in medical journals . Chronic . The treatment of chronic shell shock varied widely according to the details of the symptoms , the views of the doctors involved , and other factors including the rank and class of the patient . There were so many officers and men suffering from shell shock that 19 British military hospitals were wholly devoted to the treatment of cases . Ten years after the war , 65 , 000 veterans of the war were still receiving treatment for it in Britain . In France it was possible to visit aged shell shock victims in hospital in 1960 . Shell shock and cowardice . Some men suffering from shell shock were put on trial , and even executed , for military crimes including desertion and cowardice . While it was recognised that the stresses of war could cause men to break down , a lasting episode was likely to be seen as symptomatic of an underlying lack of character . For instance , in his testimony to the post - war Royal Commission examining shell - shock , Lord Gort said that shell - shock was a weakness and was not found in " good " units . The continued pressure to avoid the medicalisation of shell shock meant that it was not , in itself , an admissible defence . Executions of soldiers in the British Army were not commonplace . While there were 240 , 000 Courts Martial and 3080 death sentences handed down , in only 346 cases was the sentence carried out . 266 British soldiers were executed for " Desertion " , 18 for " Cowardice " , 7 for " Quitting a post without authority " , 5 for " Disobedience to a lawful command " and 2 for " Casting away arms " . Controversially , on 7 November 2006 the government of the United Kingdom gave them all a posthumous conditional pardon . In some cases , for instance that of Private Harry Farr , men were executed who had previously suffered from shell shock , and who would very likely today have been diagnosed with post - traumatic stress disorder or another psychiatric syndrome , and would not be executed . Commission of Enquiry . The British government produced a " Report of the War Office Committee of Enquiry into " Shell - Shock " " which was published in 1922 . Recommendations from this included : Part of the concern was that many British veterans were receiving pensions and had long - term disabilities . By 1939 , some 120 , 000 British ex - servicemen had received final awards for primary psychiatric disability or were still drawing pensions – about 15 % of all pensioned disabilities – and another 44 , 000 or so … were getting pensions for ‘ soldier ’ s heart ’ or Effort Syndrome . There is , though , much that statistics do not show , because in terms of psychiatric effects , pensioners were just the tip of a huge iceberg . " War correspondent Philip Gibbs wrote : Something was wrong . They put on civilian clothes again and looked to their mothers and wives very much like the young men who had gone to business in the peaceful days before August 1914 . But they had not come back the same men . Something had altered in them . They were subject to sudden moods , and queer tempers , fits of profound alternating with a restless desire for pleasure . Many were easily moved to passion where they lost control of themselves , many were bitter in their speech , violent in opinion , frightening . One British writer between the wars wrote : There should be no excuse given for the establishment of a belief that a functional nervous disability constitutes a right to compensation . This is hard saying . It may seem cruel that those whose sufferings are real , whose illness has been brought on by enemy action and very likely in the course of patriotic service , should be treated with such apparent callousness . But there can be no doubt that in an overwhelming proportion of cases , these patients succumb to ‘ shock ’ because they get something out of it . To give them this reward is not ultimately a benefit to them because it encourages the weaker tendencies in their character . The nation cannot call on its citizens for courage and sacrifice and , at the same time , state by implication that an unconscious cowardice or an unconscious dishonesty will be rewarded . Impact on the development of psychiatry . At the beginning of World War II , the term " shell shock " was banned by the British Army , though the phrase " postconcussional syndrome " was used to describe similar traumatic responses . Society and culture . Shell shock has had a profound impact in British culture and the popular memory of World War I . At the time , war writers like the poet Siegfried Sassoon dealt with shell shock in their work . Sassoon spent time at Craiglockhart War Hospital , which treated shell shock casualties . Author Pat Barker explored the causes and effects of shell shock in her Regeneration Trilogy , basing many of her characters on real historical figures and drawing on the writings of the first world war poets and the army doctor W . H . R . Rivers .