The Second Battle of Tikrit was a battle in which Iraqi Security Forces recaptured the city of Tikrit (the provincial capital of the Saladin Governorate) from the Islamic State of Iraq and the Levant (ISIL). Iraqi forces consisted of the Iraqi Army and the Popular Mobilization Forces (the bulk of the ground forces, consisting of Shia militiamen and also some Sunni tribesmen), receiving assistance from Iran's Quds Force officers on the ground, and air support from the American, British, and French air forces.
The city of Tikrit, located in the central part of the Saladin Governorate in north of Baghdad and Samarra and lying adjacent to the Tigris River, was lost to ISIL during the huge strides made by the group during its offensive in June 2014. After its capture, ISIL retaliated with the massacre at Camp Speicher, a nearby training facility for the Iraqi Air Force. After months of preparation and intelligence-gathering, Iraqi forces engaged in offensive operations to fully encircle and subsequently retake the city, starting on 2 March 2015. The offensive was the largest anti-ISIL operation to date, involving some 20,000–30,000 Iraqi forces (outnumbering ISIL fighters more than two-to-one), with an estimated 13,000 ISIL fighters present. It was reported that 90% of the residents of the city left out of fear both of ISIL and retaliatory attacks by Shia militias once the city is captured. As such, most of the residents fled to nearby cities, such as Baghdad and Samarra, or even further to Iraqi Kurdistan or Lebanon.