Accidental Allies: The US-Syrian Democratic Forces Partnership Against the Islamic State

The U.S.-led effort to fight the Islamic State in northeastern Syria since 2014 has been as controversial and poorly understood as it has been significant. Advocates of fighting “by, with and through” the Kurdish-led Syrian Democratic Forces (SDF) view the campaign as a near-ideal case study of a cost-effective U.S. military intervention that should be duplicated in the future. Critics of the campaign say that the U.S. allied itself with a terrorist group and endangered its ties with Turkey...