"This report examines the Islamic State's self-reported military activities in 16 cities, 11 in Iraq and five in Syria. From each city's date of liberation from the Islamic State until April 2017, the Islamic State reported that it carried out 1,468 separate attacks in these 16 cities. The volume of military operations in these cities provides evidence for the idea that the Islamic State, once relegated in Iraq to guerilla warfare from 2003-2011, may be returning to this form of existence in Iraq and Syria. However, this activity is not uniform across each of the cities. As the coalition edges closer to taking formal control of Mosul and Raqqa back from the Islamic State, this report highlights trends in the data to provide additional insight for those planning and implementing post-liberation security, reconstruction, and governance plans."
Combating Terrorism Center: http://www.ctc.usma.edu/