The United States wants Europe to take over the majority of NATO’s conventional defense capabilities, from intelligence to missiles, by 2027, Pentagon officials told diplomats in Washington this week, a tight deadline that struck some European officials as unrealistic. The message, recounted by five sources familiar with the discussion, including a U.S. official, was conveyed at a meeting in Washington this week of Pentagon staff overseeing NATO policy and several European delegations. The shifting of this burden from the U.S. to European members of the North Atlantic Treaty Organization would dramatically change how the United States, a founding member of the post-war alliance, works with its most important military partners. The U.S. officials told their counterparts that if Europe does not meet the 2027 deadline, the U.S. may stop participating in some NATO defense coordination mechanisms.

