I googled military contracting + America. I came across this site:
http://www.disinfopedia.org/wiki.phtml?title=PMCPrivate Military Corporations are also referred to as Privatized Military Firms (PMF)s, ... among other things, and could be considered an alternative to the Draft.
According to ICIJ, since 1994, the U.S. Defense Department has entered into 3,061 contracts valued at more than $300 billion with 12 of the 24 U.S.-based PMCs. More than 2,700 of those contracts were held by just two companies: Kellogg Brown and Root (KBR), a subsidiary of Vice President Dick Cheney's former employer, Halliburton Company, and Virginia-based management and technology consulting firm, Booz Allen Hamilton. The ICIJ report could not determine what percentage of these contracts was for training, security or logistical services because of the breadth of the services offered by the larger companies and the paucity of information provided by the Pentagon.<2>
The Pentagon does not even know how many contractors it uses. According to U.S. News and World Report, a preliminary report to Congress in April 2002 guessed that the Army contracted out the equivalent of between 124,000 and 605,000 persons in 2001. It is also hard to estimate how many people are working for PMCs because many of them are freelance contractors who may work for more than one of the PMCs. Often, it's hard to tell where the U.S. Army ends and a private company begins, as certain training programs run by PMCs allow retired military personnel to put their uniforms back on. One of the best known, privately held MPRI, based in Alexandria, Virginia, with over 700 full-time employees boasts of having "more generals per square foot than in the Pentagon."<3>
Anyone know anything about this site? 600,000+ seems like the tip of the iceberg. This site has lots of links and I'll keep posting when I find out more info.