> Thinking of violence as anything but utterly ordinary, necessary and proper has been the exception rather than the rule in human societies. People still believe in war as a noble adventure that turns undisciplined boys into proper men.

One thing to consider is that a lot of this is literally propaganda.

If you want war, you need rally public support. Or at least it is helpful.It is tripple helpful for young men to go there voluntary and see it as calling. You need then to believe certain things to facilitate building great army.

The army and war being shown as aspirationa was often political. Even censorship rules often facilitated that goal.