Just for another perspective--Like a lot of conscripts, a friend of mine came back from Vietnam completely against the war for very good reasons: He had seen his buddies killed for a cause that disgusted them when they saw it up close.

He loathed this song.

The last two lines especially didn't go over well:

"You can be the first one on your block
To have your boy come home in a box."

I can't deny its biting satirical force, but I never much cared for it after hearing his feelings about it.