It must be understood that the kind of continuous, protracted combat that produces such high psychiatric casualty rates is largely a product of 20th-century warfare. The Battle of Waterloo lasted only a day. Gettysburg lasted only three days--and they took the nights off. It was only in World War I that armies began to experience months of 24-hour combat, and it is in World War I that vast numbers of psychiatric casualties were first observed.<ref>[https://archive.md/rxoj6#selection-279.0-279.136 "Psychological Effects of Combat"] By Dave Grossman and Bruce K. Siddle, Encyclopedia of Violence, Peace and Conflict, Academic Press, 2000.</ref>}} | It must be understood that the kind of continuous, protracted combat that produces such high psychiatric casualty rates is largely a product of 20th-century warfare. The Battle of Waterloo lasted only a day. Gettysburg lasted only three days--and they took the nights off. It was only in World War I that armies began to experience months of 24-hour combat, and it is in World War I that vast numbers of psychiatric casualties were first observed.<ref>[https://archive.md/rxoj6#selection-279.0-279.136 "Psychological Effects of Combat"] By Dave Grossman and Bruce K. Siddle, Encyclopedia of Violence, Peace and Conflict, Academic Press, 2000.</ref>}} |