According to the Spiegel report, an envoy of US Defense Secretary Pete Hegseth briefed senior officials from member states on the plan at NATO headquarters in Brussels late last week.

The US intends to significantly reduce military contributions available to assist European allies in a crisis, including fighter jets, warships and mid-air

The number of U.S. fighter jets is set to fall by a third, Spiegel cited U.S. envoy Alexander Velez-Green as saying during the closed-door meeting.