Operation Inherent Resolve (OIR) is the U.S. military campaign against the Islamic State of Iraq and Syria (ISIS), conducted by a combined joint task force. The mission began in 2014 and is still ongoing.
Citation: Special report: Operation inherent resolve. (n.d.). Retrieved February 19, 2019, from https://www.defense.gov/OIR/ Lange, K. (2017, October 11). U.S. central command: Differentiating its major operations. Retrieved February 19, 2019, from http://www.dodlive.mil/2017/10/11/u-s-central-command-differentiating-its-major-operations/