Avideo of masked gunmen released to al-Jazeera, the region's most influential satellite television channel; a bootleg DVD featuring burnt-out humvees set to religious chanting; a claim of responsibility for an attack posted on one of the internet's ever-migrating Islamist websites. These are all the outside world sees of most of Iraq's myriad insurgent groups. So it is hard to work out what connection, for example, the Islamic Jihad Brigades of Muhammad's Army has to the Armed Vanguards of Muhammad's Second Army, or whether a particular movement has a nationwide network with thousands of disciplined members or three self-promoting cousins with a video camera.
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