XD @ Topic.
Cain, you're a kid. You're young, and no offense, but your goals seem silly. You want to be on the top five list of the most kills? What!? You should be focusing on school, education, relationships and a career. You're a teen and you already decided to join the military. The Military is nothing more then an organized lie, to bend a thousand guys like yourself to do the Governments will, which is always notioned after the official gets the highest buck. The Iraq war is nothing more then a (Poorly) explained excuse to get back at some gentlemen that Bush's dad had a grudge against, and an excuse to get land and money and resources. Terrorists do exist, and they are to be feared and hated, but this war was not about "Freedom" or "Liberation."
Mercenaries? Harder job to get then the Navy seals, and you have more of a chance to surviving a fourty thousand foot drop then actually getting phone calls like the Transporter to go knock off Joe Studds. You can't buy a Mercenaries 101 book or join a Mercenaries school. They're the equivical to Medieval assassins, but even harder to get to. And for your sanity, you'd have more fun punching babies then doing that. Getting PAID to kill for all you know an innocent man (Or woman.)? I'd rather die, thanks.