The chip industry’s open secret: Adversaries’ military tech relies on U.S. components

Western companies were quick to shutter operations in Russia after the country’s military invasion of Ukraine last February. But U.S. and European microelectronic tech continues to power the Kremlin’s war.

Key components from more than a dozen Western countries have been found in the military equipment used by Russian forces in Ukraine, according to research from the British academic journal Royal United Services Institute. A separate report from independent research group Conflict Armament Research analyzed the components of four Iranian-made drones, also known as unmanned aerial vehicles, used by Russia...