The independent review will be conducted in addition to assessments by the defense secretary’s chief of staff and the White House after top officials were not notified of the episode for days.
The Defense Department’s inspector general found that American defense officials and diplomats in Washington and Europe had failed to quickly or fully account for all of nearly 40,000 weapons sent to Ukraine.
American officials and their allies warned that there would be consequences for the Houthis, the Iranian-backed armed group that has disrupted shipping in the Red Sea.
The president’s chief of staff sent a memo to cabinet secretaries reminding them to keep the White House informed when they may not be able to perform their duties.