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

What is PTSD, the condition Salman Rushdie is coping with after the knife attack?

Excerpt from a WWI Documentary about shell shock (PTSD). : r/interestingasfuck

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

History of PTSD and Trauma Diagnoses - Shell shock to the DSM

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

During WWl, what was shell-shock? - Quora

What if PTSD Is More Physical Than Psychological? - The New York Times

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

PTSD and the War of Words - Adam M. Chekroud, Hieronimus Loho, Martin Paulus, John H. Krystal, 2018

Kevlar for the Mind: PTSD not unique to modern war, but there is a new path forward