BAGHDAD — The United States is grappling with a rapidly evolving threat from Iranian proxies in Iraq after militia forces specialized in operating more sophisticated weaponry, including armed drones, have hit some of the most sensitive American targets in attacks that evaded U.S. defenses.
At least three times in the past two months, those militias have used small, explosive-laden drones that divebomb and crash into their targets in late-night attacks on Iraqi bases — including those used by the C.I.A. and U.S. Special Operations units, according to American officials.
Gen. Kenneth F. McKenzie Jr., the top American commander in the Middle East, said last month that the drones pose a serious threat and that the military was rushing to devise ways to combat them.
Iran — weakened by years of harsh economic sanctions — is using its proxy militias in Iraq to step up pressure on the United States and other world powers to negotiate an easing of those sanctions as part of a revival of the 2015 nuclear deal. Iraqi and American officials say Iran has designed the drone attacks to minimize casualties that could prompt U.S. retaliation.
a Defense Intelligence Agency assessment published in April. In the last year, a proliferation of previously unknown armed groups have emerged, some claiming responsibility for rocket attacks on U.S. targets.
thousands of American military contractors operate.