I also found it funny that to some of the people commenting, "American mercenaries" automatically means "Blackwater". Blackwater was a private military company - in fact they no longer exist as Blackwater - and what they do is legitimate security work, highly regulated and overseen by the US Government.
You've got to figure - we've had almost 15 years of continual war ... before that we had a professional military the likes of which the world has never seen, with a lot of continual experience in places like Grenada, Lebanon, Panama, Kuwait, Iraq, Somalia, Bosnia, Kosovo, Afghanistan, Libya and the Mahgreb . . . and so of course it is inevitable these days that guys are "freelancing" - in two places specifically: Ukraine and Iraq.
The American warrior class is firmly established and quite distinct and visible . . . we are also the most misunderstood class of American society . . . and it is an honor to be included as a member of it . . .