Factions.

This is coolbert:

Those three hundred American special forces and intelligence personnel being deployed to Iraq in response to the crisis in danger from the locals in a way they were not only several years ago?

Factionalism creating an anger and hate among the Iraqi that mitigates concerted action. American personnel if and when embedded with Iraqi units might find themselves in grave danger from the "friendlies".

"U.S. Sees Risks in Assisting a Compromised Iraqi Force"

"A classified military assessment of Iraq’s security forces concludes that many units are so deeply infiltrated by either Sunni extremist informants or Shiite personnel backed by Iran that any Americans assigned to advise Baghdad’s forces could face risks to their safety, according to United States officials."

"The report concludes that only about half of Iraq’s operational units are capable enough for American commandos to advise them if the White House decides to help roll back the advances made by Sunni militants in northern and western Iraq over the past month."

NOT to mention the one thousand or so "security personnel" also engaged in Iraq as protection for those three hundred American troops.

coolbert.