The United States completed its prior withdrawal of troops in December 2011, concluding the Iraq War. In June 2014, the United States formed Combined Joint Task Force – Operation Inherent Resolve (CJTF-OIR) and re-intervened at the request of the Iraqi government due to the rise of the Islamic State of Iraq and the Levant (ISIL). Iran also intervened in Iraq in June 2014. On 9 December 2017, Iraq declared victory against ISIL, concluding the 2013–2017 War in Iraq and commencing the latest ISIL insurgency in Iraq.