More Vietnam veterans have died by suicide than were killed in Vietnam. According to the Veterans Administration, one veteran dies by suicide every hour in the USA. 

‘The survivor is a disturber of peace. He is a bearer of ”unspeakable” things. About these he aims to speak, and in so doing he undermines, without intending to, the validity of existing norms. He is a genuine transgressor, and here he is made to feel real guilt. The world to which he appeals does not admit him, and since he has looked to this world as the source of moral order, he begins to doubt himself. And that is not the end, for now his guilt is doubled by betrayal– of himself, of his task, of his vow to the dead. The final guilt is not to bear witness. The survivor’s worst torment is not to be able to speak.’ – Terrence Des Pres in ‘The Survivor’.

”If the thing they were fighting for was important enough to die for then it was also important enough for them to be thinking about it in the last minutes of their lives. That stood to reason. Life is awfully important so if you’ve given it away you’d ought to think with all your mind in the last moments of your life about the thing you traded it for. So, did all those kids die thinking of democracy and freedom and liberty and honor and the safety of the home and the stars and strips forever? You’re goddamn right they didn’t.” – Dalton Trumbo in ‘Johnny got his gun.’.
Viktor E. Frankl said, ” Suffering ceases to be suffering when it has meaning.” 
Meaningless violence gives birth to more meaningless violence. There are no winners. All sides loose.