Don McCullin on Shell-shocked US Marine

Shell Shock, Definition, Symptoms & Causes

Why was shell shock so prevalent in WWI? - Quora

Is there any evidence that the soldier in this photo has shell shock? (Alternate question: is the soldier in this photo a good example of shell shock?) : r/AskHistorians

WWII Post Traumatic Stress, The National WWII Museum

shell shock stare explained｜TikTok Search

Medicine on the Western Front (part two) - The National Archives

Combat stress reaction - Wikipedia

Shellshock in the College collections Royal College of Physicians of Edinburgh

What are the most chilling images of shell-shocked soldiers from WWI? - Quora

Post Traumatic Stress Disorder and the American Civil War - National Museum of Civil War Medicine