I wonder who it's from?

This poem struck me with two things. First is that Americans as a whole can't handle wars (seen in WWI WWII Korea Vietnam and Iraq). Although Americans nationwide don't have any trouble flying their flags and their yellow ribbons, they can't handle any real war facts other than "sure rains here a lot" and this is seen with the parents that beg their son to tell them "everything". We can't handle it and we just want to stay in our peaceful world.
2nd this son is acts just like many kids would towards their parents. He almost knows that his mom won't be able to handle it, so he doesn't give her a real answer until after she begs and pleads for it. In this way he doesn't get in trouble and he almost shows his parents up in a way.