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Exclusive-US plans to shrink forces available to NATO during crises, sources say

Published by Global Banking & Finance Review

Posted on May 19, 2026

4 min read

· Last updated: May 20, 2026

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Exclusive-US plans to shrink forces available to NATO during crises, sources say

US Commitment to NATO Forces and Policy Shifts

By Gram Slattery, Jonathan Landay and Andrew Gray

Planned Reduction in US Military Support

WASHINGTON/BRUSSELS, May 20 (Reuters) - The Trump administration is planning to tell NATO allies this week that it will shrink the pool of military capabilities that the U.S. would have available to assist the alliance's European nations in a major crisis, three sources familiar with the matter said. 

Under a framework known as the NATO Force Model, the alliance's member countries identify a pool of available forces that could be activated during a conflict or any other major crisis, such as a military attack on a NATO member.

Details of the NATO Force Model

While the precise composition of those wartime forces is a closely guarded secret, the Pentagon has decided to significantly scale down its commitment, said the sources, who requested anonymity to speak candidly about the plans.

U.S. President Donald Trump has made clear he expects European countries to take over primary responsibility for the continent's security from the United States. The message to allies this week is a concrete sign of that policy being implemented.

Uncertainties and Announcements

Several details were unclear, such as how quickly the Pentagon plans to shift crisis-mode responsibilities onto European allies. The sources said, however, that the Pentagon plans to announce its intention to lessen its commitment at a Friday meeting of defense policy chiefs in Brussels.

US Nuclear Commitment Remains

Pentagon policy chief Elbridge Colby has said publicly that the United States will continue to use its nuclear weapons to protect NATO members, even as European allies take the lead on conventional forces. 

The U.S. will likely be represented by Alex Velez-Green, a key aide to Colby, the sources said. Adjusting the NATO Force Model has emerged as a key priority of Colby's team heading into the next NATO leaders' summit, which will take place in Turkey in July, one of the sources added.

Reactions from NATO and Officials

Speaking to reporters in Brussels, NATO Secretary General Mark Rutte said he was not allowed to disclose the upcoming U.S. announcement but the move was "to be expected" as the alliance seeks to "end the over-reliance ... on one ally" for its defence.

"This was to be expected, I think it's only right that it happens," Rutte said.

The Pentagon did not immediately respond to a request for comment. 

Alliance Under Strain

Concerns Among European Allies

The NATO alliance is under unprecedented strain, with some European countries concerned that Washington may withdraw outright. A major adjustment to the forces the U.S. would make available during wartime will only intensify those concerns.

Recent US Troop Reductions

In the past few weeks, the Trump administration has announced plans to cut about 5,000 U.S. troops from Europe, including a decision to cancel a deployment of an Army brigade to Poland - a surprise decision that was slammed by U.S. lawmakers.

One of the sources and another source familiar with the matter said aides on Capitol Hill were aware of and concerned about the Pentagon's plans to narrow its commitments under the NATO Force Model.

Ongoing US-European Tensions

A senior NATO diplomat said, however, they still believed there is an understanding that the United States would come to Europe's aid if it was in trouble.

Trump and many of his aides have slammed European allies for not spending enough on their militaries and relying on the U.S. for conventional defense, and they point out that the U.S. still has tens of thousands of troops in Europe. 

Additional Points of Contention

The president's ambition to take control of Greenland, a Danish overseas territory, has further inflamed transatlantic tensions, as has an ongoing spat between Trump and German Chancellor Friedrich Merz, who has sharply criticized Trump's war with Iran.

European allies generally counter that they are rapidly beefing up their military capabilities, but that doing so cannot be done overnight.  

Reporting Credits

(Reporting by Gram Slattery and Jonathan Landay in Washington and Andrew Gray in Brussels; Additional reporting by Phil Stewart in Washington and Lili Bayer in Brussels; Editing by Don Durfee, Alistair Bell and Hugh Lawson)

Key Takeaways

  • The U.S. plans to shrink its available wartime force pool under the NATO Force Model, marking a concrete implementation of Trump's shift in burden to Europe.
  • Already, the U.S. has announced withdrawal of 5,000 troops from Germany and cancelled a 4,000‐troop deployment to Poland, raising alarm among allies and lawmakers.
  • NATO’s Supreme Allied Commander Europe says the reductions won’t undermine defense, and stresses the drawdown will span years to allow European forces to grow.

Frequently Asked Questions

What changes is the US making to its NATO force commitments?
The US plans to significantly reduce the pool of military capabilities it provides to NATO during major crises, shifting more responsibility to European allies.
Why is the US scaling back support for NATO's crisis forces?
The move aligns with President Trump's policy for European countries to take over primary responsibility for continental security and reduce reliance on the US.
When will the Pentagon announce its plan to reduce NATO commitments?
The Pentagon is expected to announce its intention at a defense policy chiefs meeting in Brussels on Friday.
How are European allies responding to the US decision?
Some European countries are concerned about the reduced US support, though European allies note they're increasing their own military capabilities.
Will the US still protect NATO allies with nuclear weapons?
Yes, Pentagon officials have stated the US will continue to use its nuclear deterrent to protect NATO members, even as conventional force commitments are reduced.

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