NATO leaders met in Ankara this week to discuss the reduced defense contribution of the United States and the resulting security gaps in Europe [1].

The shift marks a critical turning point for the alliance's collective security. As the U.S. reduces its military footprint, European nations must decide if they can independently maintain the deterrence levels required to ensure regional stability.

During the second day of the summit on July 9 [1], officials addressed the partial withdrawal of conventional U.S. forces. This process of withdrawing from conventional European defense began in February 2025 [2]. The reduction has forced European leaders to evaluate how to compensate for the shortfall to maintain the credibility of the alliance [3].

U.S. Defense Minister Pete Hegseth said the intention is to shift the financial and operational burden. "We are putting pressure on Europe to invest more," Hegseth said [4].

European leaders expressed urgency regarding the need for increased capabilities. Dutch Prime Minister Mark Rutte said filling these gaps is "absolutely necessary" [1]. German Defence Minister Boris Pistorius also joined discussions on how the continent can replace the missing U.S. support [3].

While the U.S. administration has pointed to low defense spending by European members, the reduction in support creates immediate operational vulnerabilities [5]. European ministers have held separate meetings in Brussels to coordinate a response to the U.S. strategy [3]. The challenge remains whether European budgets can scale quickly enough to match the departing U.S. conventional force presence [2].

"We are putting pressure on Europe to invest more."

The U.S. shift toward a reduced conventional presence in Europe signals a move away from the traditional security guarantee that defined the post-Cold War era. By forcing European nations to absorb these costs and capabilities, the U.S. is accelerating the transition toward 'European strategic autonomy,' though the speed of the U.S. withdrawal may outpace Europe's ability to modernize its own militaries.