World War I

Shell-shock was a term coined by British doctors working in military hospitals during World War 1 which described a condition that is currently known as PTSD. This condition affected many soldiers during WW1 and this was the first time it had such a widespread impact, largely due to the scale and the highly traumatizing nature of the war. Initial symptoms included headaches, tiredness, and/or lack of concentration. As the symptoms progressed, many soldiers suffered mental breakdowns and were rendered incapable of returning to the front.