This analysis examines NATO’s structural reconfiguration as the United States recalibrates its military commitment in Europe, European allies accelerate their efforts to rebuild defence capacity, and the Alliance prepares for a new internal balance ahead of the Ankara Summit. It argues that Washington is not simply withdrawing from Europe, but reshaping its role through a more selective, conditional and globally oriented posture. For Europe, the challenge is to turn political ambition and new financial instruments into real industrial and operational capabilities. For the eastern flank and Romania, the central issue is how to preserve credible deterrence, strengthen European defence integration and adapt to a NATO no longer organised around the same American-centric logic that defined the post-1991 and post-2014 periods.