The battle now rages for the ISIS-held, northern Iraqi city of Tikrit. ISIS captured Tikrit, located roughly seventy miles north of Baghdad, in June 2014, marking their second significant gain after Mosul. The Institute for the Study of War has been keeping a thorough tracking of the Iraqi army’s offensive since February 26. Notably, this offensive has not been coordinated with the United States. Of the 30,000 pro-government fighters, two thirds are drawn from Shiite militias, and Iranian influence is pervasive throughout. Iraqi forces’ initial advance into Tirkit has been stymied by roadside bombs and suicide attacks—the same tactics used to such great effect by Al Qaeda in Iraq (AQI), ISIS’ predecessor, some ten years ago.