Blackwater(I think they have since changed their name) is a private mercenary organization employed your Federal gubmint in Iraq, Afghanistan and other places around the world.
The DoD no longer has USA soldiers do soldiering when it is easier to send in mercenaries to terrorize and break the rules set by Geneva war convention following WW1. To much of the rest of the world, the USA Dod is a terrorist organization. That is what has become of our nation.