1910-1919 - Shell Shock - World War I

Shell Shock

 when World War I ended, in soldiers minds there was something left, something they couldn't handle. It's called "Shell Shock". Depression, anxiety, inappropriate behavior, strange fears & phobias -  in 1914 through 1918 caused by trauma of the battle.

"Arthur Hubbard was one of millions of men who suffered psychological trauma as a result of their war experiences. Symptoms ranged from uncontrollable diarrhoea to unrelenting anxiety. Soldiers who had bayoneted men in the face developed hysterical tics of their own facial muscles. Stomach cramps seized men who knifed their foes in the abdomen. Snipers lost their sight. Terrifying nightmares of being unable to withdraw bayonets from the enemies' bodies persisted long after the slaughter."

sources:
http://www.bbc.co.uk/history/worldwars/wwone/shellshock_01.shtml