ISIS Sanctuary: May 10, 2017

U.S.-backed forces continue to advance on the major ISIS-held urban centers of Mosul, Iraq and Raqqa, Syria. Iraqi Security Forces (ISF) have encircled ISIS in Mosul’s Old City. The U.S.-backed, Kurdish-dominated Syrian Democratic Forces (SDF) captured Tabqa, a city adjacent to Raqqa that contains Syria’s largest dam. ISIS also lost terrain in southern Syria, as various factions of the Syrian opposition, including some with U.S. backing, cleared ISIS from positions in Suweida and the Qalamoun mountains. ISIS will attempt to offset these losses during its annual Ramadan offensive campaign, anticipated to begin around May 27. ISIS’s campaign in 2017 increasingly resembles its 2013 insurgent campaign; ISIS’s Ramadan plan will likely focus on synchronizing spectacular attacks across different locations for combined effect. Potential targets include religious sites, security forces, and oil infrastructure. ISIS may also conduct ground attacks in Salah ad Din, Anbar, and central Syria where ISIS retains latent combat capability.