Anbar, once the heart of a fierce Sunni insurgency, has been relatively quiet since local tribal leaders began cooperating with U.S. and Iraqi forces against al Qaeda in 2006.

• 巴尔省，一度激进的逊尼派武装已经相对平静，因为当地部族领导人在2006年开始与美国和伊拉克部队对付基地组织。