New research sharpens our understanding of violence in the Middle Ages:
"Modern military psychology enables us to read medieval texts in a new way – giving us insight into the perception of violence in the Middle Ages in the general population and the use of lethal violence by knights," says Thomas Heebøll-Holm of the SAXO Institute at the University of Copenhagen, who researches the perception of violence in the late Middle Ages. …
[Heebøll-Holm] came across a book written by a knight who lived in the first half of the 14th century. "His name was Geoffroi de Charny, and he was one of the most respected knights of his age. The book, about the life of a knight, included the psychological consequences of being a knight – and they strongly resemble the symptoms of PTSD." In his book, de Charny advises knights on how to relate to the fact that they must kill people when they are at war. He also mentions some of the hardships knights face: poor sleep, hunger, and a feeling that even nature is going against them.