Analysis of A letter from Nam

"My love" it begins while all ears listen,
While in the Nam the cold steel glistens,
"I'm fighting for freedom and my loved ones back home",
As the letter goes on, the young soldier is alone.
The letter goes on, signed love from our hero,
While the sights of a rifle are suddenly zero.
The trigger is pulled, the bullet sent flying,
In less than a moment the young soldier is dying.
Back home his young wife had just bore a child,
That is fatherless because mankind went wild.