After more than a decade, the U.S. has officially ended Operation Inherent Resolve in Iraq. The final U.S. forces have departed Erbil, marking the close of the military campaign launched in 2014 to help defeat ISIS. U.S. officials say the mission dealt a devastating blow to the terror group's territorial control, while American forces will continue counterterrorism operations elsewhere in the region. Read more about what comes next for the U.S. military in the region: