LEADERS
Largely rudderless without a real infrastructure. Some of these men are paid by others to do the insurgency's dirty work
WHO THEY ARE
Gunmen for hire, criminals pursuing illegal enterprises, aggrieved citizens angry about the occupation
CONNECTIONS AND TACTICS
The majority of Iraq's male population has performed some military service, and householders commonly keep assault rifles. The U.S. has discovered numerous instances of impoverished young men being paid by organized groups to conduct attacks on U.S. forces. But increasingly, citizens outraged at how U.S. troops search houses or kill innocent civilians are taking up arms to fire on G.I.s. Organized attacks sometimes inspire locals to join in. Their involvement remains ad hoc and largely ineffective but stokes fears that a general uprising could one day emerge