When it comes to the US military, it's: Lots of people, cash, equipment but absolutely no idea.
Just to emphasize ... All the gear & no idea
In addition: The US military can be split into 2 categories - The Marines and The Rest. Both categories are taught to throw as much lead as possible downrange but at least the Marines occasionally check their targets (targets can still be friendly forces, each other or women and children though!).
USMC: A group of high school dropouts that desperately wants to be like the infantry. Organization and organic weapon systems suited for a shock force only; the US Marine Corps is commonly used as a conventional infantry force and subsequently manages to take more casualties than their infantry counterparts. Marines are too arrogant to be called "soldiers" and too stupid to take cover when a fire-fight starts.
US Marines were accused of several hundred atrocities during the war in Vietnam, details of most are still kept under lock and key. This pattern appears to be repeating in Iraq as these assault minded infantry are used for policing. They seem ill-suited to the task (of being a target for snipers and roadside bombs) their shaved ape president demands of them.
While on leave/civvy street/out in town, US Marines (usually in big groups) hang around public places in thier parade uniforms sometimes topped off with tinted aviator shades to add the glamour deliberatly approach giggling females in An Officer and a Gentleman/Top Gun bar scene fashion.
On the bright side, at least it sorts out the fuckwits so the US Army doesn't have to.
Not to be confused with the far superior, more professional and tremendously more sexually deviant Royal Marines, of course.
As for special forces; not nearly enough is known about any of them to start comparing them like pokemon cards.