John Rutherford Allen (born December 15, 1953) is a retired United States Marine Corps four-star general, and former commander of the NATO International Security Assistance Force and U.S. Forces – Afghanistan (USFOR-A). On September 13, 2014, President Barack Obama appointed Allen as special presidential envoy for the Global Coalition to Counter ISIL (Islamic State of Iraq and the Levant). He was succeeded in that role by Brett McGurk on October 23, 2015. He is the co-author of Turning Point: Policymaking in the Era of Artificial Intelligence with Darrell M. West (Brookings Institution Press, 2020) and Future War and the Defence of Europe alongside Lieutenant General (Ret.) Ben Hodges and Professor Julian Lindley French (Oxford University Press, 2021). Allen was president of the Brookings