Because I am over 60, I would choose either Bob Dylan's "Masters of War"  or Creedence Clearwater Revival's "Fortunate Son".  I probably would choose "Fortunate Son" simply because war usually is a rich man's war who send the poor to do the actual fighting.  Like the song says, "I ain't no senator's son" which means he could be sent to fight as he will not be excused as President Bush was during the Vietnam war and never sent into active duty.  He was an example of a "fortunate son".  There are so many other choices from Bruce Springsteen to Green Day and covering protests against the Vietnam War, President Bush and so many artists to choose from.