What does that mean? It means America has a military 2 times larger than it's advertised size
Guess the Middle East Mulla's didn't get the memo of the serious ass kicking about to kick off in Iran. One Army can stay in Iraq and the other start on Iran. It's pretty awesome.
SO that brings American forces to nearly 1 Million strong if you include non combat positions, support, administration and contractors.
Also keep in mind most of the Mercenaries are former and experienced military men.