The Pentagon has opened a review of the U.S. military mission in Europe that could withdraw 25,000 troops or more, the deepest cut to the American presence on the continent since the Cold War.
The Pentagon has opened a formal review of the American military mission in Europe, and the options on the table include withdrawing 25,000 troops or more. That would erase roughly a third of the approximately 80,000 U.S. service members stationed across the continent and mark the deepest reduction of American forces there since the Cold War.
The review launched this week, with defense officials tasked to work through how a leaner, faster and more mobile American posture would actually function. Officials describe the effort as a strategic reassessment rather than a withdrawal order, and no final decisions have been made. The direction, however, is unmistakable. The administration wants European allies funding and fielding more of their own defense, and it is prepared to restructure the American footprint to force the issue.
The announcement is the clearest sign yet that the White House intends to turn years of burden-sharing rhetoric into structural change. American planners have long argued that the alliance has leaned on U.S. logistics, airlift, intelligence and missile defense while European capitals treated the 2 percent of gross domestic product defense benchmark as an aspiration rather than an obligation.
That benchmark was first agreed in 2014 and has been raised repeatedly since, yet spending across the alliance remains uneven. Washington's contention is straightforward: if Europe treats the American presence as a permanent subsidy, it will never build the forces it says it needs.
The review also arrives days after the administration announced major progress toward a permanent U.S. Army base in Poland, which points to a rebalanced presence rather than an American exit from the continent. Officials have described the two tracks as complementary, with fewer legacy garrisons in Western Europe and more durable infrastructure in the east where the threat sits closest.
The prospect of a drawdown has already triggered an unusual response from NATO's eastern members. Several governments have offered to absorb more of the cost of hosting American troops, covering construction, utilities, training ranges and other basing expenses, in the hope of discouraging Washington from pulling forces out at all.
Those offers reflect a hard calculation. For Poland, the Baltics and Romania, the American presence is not an abstraction. It is the physical guarantee behind Article 5, and it sits within a short distance of Russian territory, missile systems and air defense networks.
The review lands in a security environment that has only grown sharper, with allied governments trading warnings about Russian sabotage, drone incursions and hybrid operations aimed at infrastructure and public confidence. Estonia, Lithuania and Poland have all pushed for faster allied investment in air defense and ammunition stockpiles, and the argument that Europe should pay for the forces defending it has become harder to dismiss.
A reduction of 25,000 or more would not empty the map. Pentagon planners have examined a model built around rotational brigades, pre-positioned equipment, expanded air and naval presence and smaller, more dispersed facilities rather than large permanent garrisons with schools, housing and family support systems attached.
That model has real appeal for a military trying to balance Europe against the Indo-Pacific while rebuilding its munitions stockpiles. Rotational units move faster, are harder to concentrate and cost less to sustain over decades. Pre-positioned armor and artillery keep firepower on the continent without keeping the people there year round.
Critics of the concept argue that rotational forces carry less deterrent weight than permanently stationed troops, and that allies read rotations as a signal that Washington might not stay. Supporters counter that a lighter, more flexible footprint is exactly what keeps the American commitment affordable and therefore durable.
The review's findings will land in a crowded political calendar. Congress has shown bipartisan appetite for limiting major European reductions, and lawmakers have used the annual defense authorization process to fence off funding for exactly this kind of restructuring. Any concrete proposal is likely to draw hearings, amendments and a sustained fight over force structure and basing rights.
Allied capitals, meanwhile, will be watching the details rather than the headlines. A shift of headquarters staff and support units reads one way. A withdrawal of armored brigades, air defense batteries or aviation from the eastern flank reads very differently, and European officials will measure the plan by what remains rather than what is removed.
For now the open questions are timing and scale. Officials have not said when the review will conclude, and no unit-level decisions have been announced. What is settled is the direction of travel. Europe will be asked to carry more of the load, and the American footprint will be rebuilt around that expectation.