Is shell shock/battle fatigue/PTSD a relatively modern condition

Mental illness and war through history, Red Bulls: Beyond Deployment

Is shell shock/battle fatigue/PTSD a relatively modern condition? Are there any documented examples from before WW1? - Quora

How PTSD went from 'shell-shock' to a recognized medical diagnosis

Shell Shock'—The 100-Year Mystery May Now Be Solved

Shell Shock, Combat fatigue, PTSD & We all know the General Patton story: 100 Years of Developing Treatment

Is shell shock/battle fatigue/PTSD a relatively modern condition? Are there any documented examples from before WW1? - Quora

PDF) Psychiatric battle casualties: an intra- and inter-war comparison

Is shell shock/battle fatigue/PTSD a relatively modern condition? Are there any documented examples from before WW1? - Quora

From The Napoleonic Wars to Vietnam And Iraq: A History of War Trauma

Is shell shock/battle fatigue/PTSD a relatively modern condition? Are there any documented examples from before WW1? - Quora

etymology - What causes the euphemisation of medical terms? - English Language & Usage Stack Exchange

Shell Shock, Combat fatigue, PTSD & We all know the General Patton story: 100 Years of Developing Treatment