Pentagon NATO Review Sets Out US Troop Options for Europe

A Pentagon review of U.S. troop deployments in Europe will produce at least four sets of options for Defense Secretary Pete Hegseth by November 6, well ahead of the review's December completion deadline, according to a document seen by Reuters.

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NATO and U.S. flags fly at the entrance to the venue, on the first day of a NATO summit, in The Hague, Netherlands June 24, 2025. REUTERS/Toby Melville/File Photo

Pentagon Sets November Deadline for Troop Options

A Pentagon review of U.S. troop deployments in Europe will produce at least four sets of options for Defense Secretary Pete Hegseth by November 6, well ahead of the review’s December completion deadline, according to a document seen by Reuters.

The six month review, announced in June, has raised concern among NATO allies that it could result in major cuts to the roughly 80,000 U.S. troops stationed across Europe. European governments also fear that countries viewed by President Donald Trump as insufficiently supportive of the U.S. Israeli war against Iran could face consequences.

The Pentagon’s previously undisclosed “Terms of Reference” outline how the review will assess U.S. military deployments and basing arrangements across Europe.

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European Command to Help Shape Troop Options

The document shows that the top U.S. general in Europe is expected to participate in a decision briefing with Pentagon policy chief Elbridge Colby by September 18.

That briefing is expected to play an important role in determining the options ultimately presented to Hegseth.

Colby is also expected to discuss the review with NATO ambassadors at the alliance’s headquarters in Brussels.

A senior Pentagon official said the range of options demonstrates the seriousness of the review.

“We want to be able to talk through the pros and cons of a variety of different force levels or dispositions,” the official told Reuters.

NATO Allies Fear Cuts May Already Be Decided

European officials remain skeptical about the review, with some privately concerned that Washington may have already decided to reduce its military presence.

The Trump administration has repeatedly indicated that it wants European NATO members to assume a larger share of the alliance’s security burden.

Trump has also criticized European allies for what he considers inadequate support during the Iran war, including delays or restrictions on granting U.S. aircraft access to bases and airspace.

NATO Secretary General Mark Rutte has acknowledged Trump’s concerns but said that most European allies have provided assistance.

The Pentagon official said Washington was moving toward providing “critical, more limited support with allies in the lead.”

Pentagon Targets NATO Free Riding

Hegseth announced the review in June while criticizing some NATO members for “free-riding.”

The Terms of Reference indicate that the review will go beyond traditional troop numbers. The Pentagon will examine U.S. access, basing and overflight rights, known as ABO, alongside space, cyber and intelligence infrastructure supporting U.S. global power projection.

The broader definition is intended to capture the different forms of military and strategic support provided by NATO allies.

Defence Spending and NATO Contributions Under Review

The Pentagon will also assess whether individual allies have credible plans to meet NATO defence spending commitments and whether they can fill gaps in the alliance’s crisis response structure following earlier U.S. reductions.

A U.S. questionnaire sent to NATO allies seeks information on defence spending, military strategy, procurement and support for U.S. foreign policy priorities.

Washington has specifically asked allies whether they have restricted U.S. access, basing or overflight rights and whether they are prepared to reduce those restrictions.

The questionnaire also asks whether countries have opposed measures designed to strengthen transatlantic defence industrial cooperation.

Responses are due by Friday.

A Broader Reassessment of America’s Role in Europe

The Pentagon official said the review is operating under a tight timetable but that previous analysis would help accelerate the process.

The review therefore represents more than a simple assessment of troop numbers. It is examining the broader military relationship between Washington and its European allies, including bases, intelligence, defence spending, industrial cooperation and strategic access.

Analysis

The Pentagon review could become a major turning point in the transatlantic security relationship. The central issue is not simply whether the United States withdraws some troops from Europe, but whether Washington is beginning to redefine its long standing role as the principal security provider within NATO.

The review also reflects President Trump’s increasingly transactional approach to alliances. Rather than treating NATO commitments primarily as long term strategic obligations, Washington appears to be assessing allies according to what they contribute in defence spending, military access and support for U.S. priorities. The Iran war has intensified this approach by providing a new test of allied reliability.

For Europe, the biggest concern is the possibility that troop reductions could occur faster than European countries can develop independent military capabilities. European governments have increased defence spending, but replacing U.S. capabilities in areas such as intelligence, surveillance, logistics, airpower and strategic mobility would take considerable time and investment.

The review’s focus on access, basing and overflight is particularly important. Even if Washington reduces troop numbers, maintaining access to European bases could allow the United States to retain the ability to rapidly reinforce the continent during a crisis. This suggests that the Pentagon may be considering a shift from a large permanent U.S. presence toward a more flexible and selective military footprint.

There is also a wider geopolitical consequence. A substantial U.S. reduction could encourage European states to pursue greater defence autonomy, while simultaneously raising questions about NATO’s deterrence credibility. Russia would closely watch any reduction in American capabilities, particularly along NATO’s eastern flank.

Ultimately, the review will test whether Europe can assume a larger share of its own defence without weakening NATO’s collective deterrence. The options delivered to Hegseth in November could therefore shape not only the future of U.S. forces in Europe but the broader balance of power within the alliance.

Pentagon Sets November Deadline for Troop Options

A Pentagon review of U.S. troop deployments in Europe will produce at least four sets of options for Defense Secretary Pete Hegseth by November 6, well ahead of the review’s December completion deadline, according to a document seen by Reuters.

The six month review, announced in June, has raised concern among NATO allies that it could result in major cuts to the roughly 80,000 U.S. troops stationed across Europe. European governments also fear that countries viewed by President Donald Trump as insufficiently supportive of the U.S. Israeli war against Iran could face consequences.

The Pentagon’s previously undisclosed “Terms of Reference” outline how the review will assess U.S. military deployments and basing arrangements across Europe.

European Command to Help Shape Troop Options

The document shows that the top U.S. general in Europe is expected to participate in a decision briefing with Pentagon policy chief Elbridge Colby by September 18.

That briefing is expected to play an important role in determining the options ultimately presented to Hegseth.

Colby is also expected to discuss the review with NATO ambassadors at the alliance’s headquarters in Brussels.

A senior Pentagon official said the range of options demonstrates the seriousness of the review.

“We want to be able to talk through the pros and cons of a variety of different force levels or dispositions,” the official told Reuters.

NATO Allies Fear Cuts May Already Be Decided

European officials remain skeptical about the review, with some privately concerned that Washington may have already decided to reduce its military presence.

The Trump administration has repeatedly indicated that it wants European NATO members to assume a larger share of the alliance’s security burden.

Trump has also criticized European allies for what he considers inadequate support during the Iran war, including delays or restrictions on granting U.S. aircraft access to bases and airspace.

NATO Secretary General Mark Rutte has acknowledged Trump’s concerns but said that most European allies have provided assistance.

The Pentagon official said Washington was moving toward providing “critical, more limited support with allies in the lead.”

Pentagon Targets NATO Free Riding

Hegseth announced the review in June while criticizing some NATO members for “free-riding.”

The Terms of Reference indicate that the review will go beyond traditional troop numbers. The Pentagon will examine U.S. access, basing and overflight rights, known as ABO, alongside space, cyber and intelligence infrastructure supporting U.S. global power projection.

The broader definition is intended to capture the different forms of military and strategic support provided by NATO allies.

Defence Spending and NATO Contributions Under Review

The Pentagon will also assess whether individual allies have credible plans to meet NATO defence spending commitments and whether they can fill gaps in the alliance’s crisis response structure following earlier U.S. reductions.

A U.S. questionnaire sent to NATO allies seeks information on defence spending, military strategy, procurement and support for U.S. foreign policy priorities.

Washington has specifically asked allies whether they have restricted U.S. access, basing or overflight rights and whether they are prepared to reduce those restrictions.

The questionnaire also asks whether countries have opposed measures designed to strengthen transatlantic defence industrial cooperation.

Responses are due by Friday.

A Broader Reassessment of America’s Role in Europe

The Pentagon official said the review is operating under a tight timetable but that previous analysis would help accelerate the process.

The review therefore represents more than a simple assessment of troop numbers. It is examining the broader military relationship between Washington and its European allies, including bases, intelligence, defence spending, industrial cooperation and strategic access.

Analysis

The Pentagon review could become a major turning point in the transatlantic security relationship. The central issue is not simply whether the United States withdraws some troops from Europe, but whether Washington is beginning to redefine its long standing role as the principal security provider within NATO.

The review also reflects President Trump’s increasingly transactional approach to alliances. Rather than treating NATO commitments primarily as long term strategic obligations, Washington appears to be assessing allies according to what they contribute in defence spending, military access and support for U.S. priorities. The Iran war has intensified this approach by providing a new test of allied reliability.

For Europe, the biggest concern is the possibility that troop reductions could occur faster than European countries can develop independent military capabilities. European governments have increased defence spending, but replacing U.S. capabilities in areas such as intelligence, surveillance, logistics, airpower and strategic mobility would take considerable time and investment.

The review’s focus on access, basing and overflight is particularly important. Even if Washington reduces troop numbers, maintaining access to European bases could allow the United States to retain the ability to rapidly reinforce the continent during a crisis. This suggests that the Pentagon may be considering a shift from a large permanent U.S. presence toward a more flexible and selective military footprint.

There is also a wider geopolitical consequence. A substantial U.S. reduction could encourage European states to pursue greater defence autonomy, while simultaneously raising questions about NATO’s deterrence credibility. Russia would closely watch any reduction in American capabilities, particularly along NATO’s eastern flank.

Ultimately, the review will test whether Europe can assume a larger share of its own defence without weakening NATO’s collective deterrence. The options delivered to Hegseth in November could therefore shape not only the future of U.S. forces in Europe but the broader balance of power within the alliance.

With information from Reuters.