One of the United States’ greatest successes in the Iraq war was in Anbar, where U.S. military forces and a remarkable tribal uprising inflicted a stunning defeat upon al-Qaeda in Iraq (AQI), the forerunner of today’s Islamic State (or ISIS). From shortly after the U.S. invasion of Iraq in 2003 until 2006, Anbar, the country’s westernmost province and a Sunni stronghold, was the center of an entrenched insurgency, which by early 2006 was threatening Baghdad. Then in the fall of 2006, just as U.S. leaders were considering the prospect of defeat, Sunni tribes in Ramadi, the capital of Anbar, formed a movement to partner with the Americans against AQI. This movement came to be known as the Anbar Awakening. Over the course of seven months of heavy fighting, the tribes, together with U.S. forces, overcame AQI in Ramadi, the provincial capital of Anbar. The awakening spread to the rest of the province and then to elsewhere in Iraq. AQI was pushed back, violence dropped, and the country witnessed a period of uneasy stability. [...]
Yet from today’s perspective, the victories of Anbar look fleeting. In January 2014, after years of preparation and growth, AQI’s successor, ISIS, conquered most of the province. The tribes that had formed the awakening movement were too divided and isolated to mount an effective resistance. From Anbar, ISIS went on to take Mosul and the rest of Sunni Iraq. Almost everything the United States had fought for from 2003 to 2007 was lost. And with Baghdad in danger, U.S. troops found themselves back in Anbar trying to help the Iraqi government recapture the province. Why did an apparent success turn out to be so fragile? [...]
What made these leaders decide to stand up against the insurgency? Publicly, they spoke of the need to bring peace to Ramadi and said they were tired of AQI’s violence. Sattar, for instance, said in a September 2006 interview that the “terrorists claimed that they were fighters working on liberating Iraq, but they turned out to be killers. Now all the people are fed up and have turned against them.” But the reality was less idealistic. AQI was brutal, but it had real support in Anbar, and the resistance to it began before it had committed its worst atrocities. The problem for the tribal leaders was that AQI was threatening their position in society—it had begun to push them aside, edging in on their territory and cutting into their smuggling business. A willingness to believe that Anbar rejected AQI for its violence, moreover, partly explains why Western observers were so surprised by the organization’s return in the guise of ISIS. [...]
After the U.S. departure, the Iraqi government became progressively more anti-Sunni. Although sectarianism had been evident throughout the time of the awakening, Maliki and the Anbar tribal leaders had reached a modus vivendi that shielded the province from its full force. Once the Americans were gone, however, Maliki began arresting Sunni politicians. In December 2012, government forces raided the home in Baghdad of the Iraqi finance minister, Rafi al-Issawi, an Anbar native and Sunni hero who had treated wounded Iraqis at the Fallujah hospital during the worst days of 2004. The raid sparked protests throughout the province, which persisted over the next year and sometimes led to clashes with the army. Most of Anbar’s tribal leaders backed the protests, yet in doing so they weakened their own control. They depended on the government for money, salaries, and privileges, but the protests forced them to choose between abandoning these perks or being discredited in the eyes of their tribesmen. And by accepting the legitimacy of mass political activity, the tribal leaders implicitly undermined their own authority. This enabled AQI supporters who had formerly been under the tribal thumb to come out, rally the people, and implicitly challenge the leaders who were now bereft of government support.