I'm not so sure. I can remember the feeling I got when the news during the Iraq war showed a couple of kids laughing like it was a big joke and listening to Metallica as they shelled Fallujah. In the US 40% of active duty members are less than 25 according. Humans have a long history of getting their young ones to do their dirty work. http://www.militaryonesource.mil/12038/MOS/Reports/2011_Demo...