ARLINGTON, Virginia — The U.S. military is looking to the war in Ukraine to see how it has worked to defend against Russian drones, which are spinoffs from the Iranian machines now targeting U.S. personnel all across the Middle East.

Ukrainian President Volodymyr Zelensky said on Thursday that the United States and European countries have requested Ukraine’s “expertise,” and it is “open” to providing it. While U.S. officials had sought Ukraine’s assistance before the current war in Iran, the deaths of six service members in a drone attack actualized those concerns.