The Trump administration plans to reduce the amount of U.S. military forces available to support European NATO allies during major crises.

This shift represents a departure from traditional U.S. security guarantees in Europe. The move could force NATO member states to accelerate their own defense spending and strategic autonomy to fill the resulting security vacuum.

According to reports, the U.S. Department of Defense expects to notify NATO of this reduction this week [1]. An official announcement is scheduled to take place during the NATO defence-policy chiefs meeting on May 22, 2026 [1]. The meeting is being held in Brussels, Belgium [2].

U.S. officials said the reduction reflects a reassessment of American commitments [1]. The administration said the decision is driven by a desire to reshape how burdens are shared among the alliance members [1].

While specific troop numbers were not detailed in the initial reports, the plan focuses on the forces available for deployment during large-scale crises. This strategy aligns with the administration's broader goal of reducing the U.S. footprint in overseas conflicts and requiring allies to provide more direct support for their own regional security [1].

The notification comes at a time of heightened tension across the European continent. The timing of the announcement, coinciding with the gathering of the alliance's top defense policymakers, suggests a coordinated effort to signal a new era of transatlantic relations [2].

“The Trump administration plans to reduce the amount of U.S. military forces available to support European NATO allies.”

This policy shift indicates a transition from a U.S.-led security architecture in Europe toward a model of shared responsibility. By reducing available crisis forces, the U.S. is leveraging its military presence to compel European allies to increase their defense budgets and take a primary role in regional deterrence. This may lead to a period of instability as NATO members scramble to reorganize their collective defense plans without the same level of American backing.