Maybe if we talked about the horrors of war more we'd have less of them in the future.
True enough, but wars tend not to last long after they lose public support (or the population 'suffers from low morale'). Having veterans speak out and seeing flag-draped coffins on the front pages tends to do that (see Vietnam), which is why modern governments try to control the war narrative ("embedded" journalism, psy-ops, etc)
https://www.google.com/search?q=how+long+has+america+been+at...