Rubio and NATO Allies Respond to US Troop Deployment Commitments in Europe

In the span of ten days in May 2026, the Trump administration canceled a planned deployment of 4,000 Army soldiers to Poland, announced the withdrawal of 5,000 troops from Germany, and then pledged to send 5,000 new troops to Poland — leaving NATO allies, Pentagon officials, and even US defense planners struggling to determine American policy on the most consequential military commitment of the postwar era.

Secretary of State Marco Rubio arrived at a NATO foreign ministers' meeting in Sweden on May 22 tasked with translating this chaos into reassurance. Swedish Foreign Minister Maria Malmer Stenergard captured the mood: "It is confusing indeed, and not always easy to navigate" [1]. A US defense official, speaking anonymously, admitted that staff had spent the previous two weeks responding to the initial withdrawal announcement before the reversal landed [1].

The stakes extend well beyond optics. Approximately 80,000 US service members are stationed across Europe, and the legal threshold requiring NATO consultation before further reductions sits at 76,000 [1]. With the initial withdrawal of 5,000 from Germany, the administration was flirting with that limit — making the subsequent reversal not just confusing but legally significant.

The Numbers: Where US Forces Stand

Source: Statista / EUCOM

Data as of May 22, 2026CSV

Germany remains the center of gravity for the US military footprint in Europe, hosting roughly 35,000 active-duty troops across major installations including Ramstein Air Base and the Grafenwöhr training complex [2]. Italy hosts about 12,000, the United Kingdom just over 10,000, and Poland approximately 10,000 [2]. Smaller contingents operate in Spain, Romania, Greece, and Belgium.

The current force of around 80,000 represents a significant decline from Cold War peaks but remains elevated compared to pre-2022 levels. Before Russia's full-scale invasion of Ukraine, the US maintained roughly 65,000 troops in Europe. The Biden administration surged that number to approximately 100,000 in the months following the invasion, deploying additional armored brigades, air defense batteries, and combat aviation units to NATO's eastern flank [3].

Source: EUCOM / Heritage Foundation

Data as of May 22, 2026CSV

The units now under review tell a specific story. The 2nd Armored Brigade Combat Team of the 1st Cavalry Division, based at Fort Hood, Texas, had soldiers in the final stages of preparation for a nine-month rotation to Poland when the Pentagon halted the deployment on May 13 [4]. A long-range fires battalion slated for Germany was also paused. In October 2025, the Pentagon had already quietly declined to replace about 700 troops stationed in Bulgaria, Hungary, Romania, and Slovakia [3].

What Rubio Said — and What He Didn't

Rubio's appearance at the NATO meeting produced no new binding commitments. He described himself as a "strong supporter" of the alliance but posed a question that crystallized the administration's transactional posture: "I know why NATO is good for Europe, but why is NATO good for America?" [5].

This framing is deliberate. The administration has linked its troop decisions to two distinct grievances: European allies' refusal to provide basing access for US operations against Iran, and what Trump views as insufficient defense spending by wealthy European nations [5]. The troop withdrawal from Germany was initially triggered by Trump's anger at German Chancellor Friedrich Merz, who had criticized the administration's strategy in the Iran conflict [1].

No written or binding guarantees on troop levels emerged from the Sweden meeting. NATO Secretary-General Mark Rutte acknowledged that allies had known for a year that US troop reductions were coming and framed the situation as an opportunity: "The trajectory is a stronger Europe and a stronger NATO, making sure over time we will be less reliant on one ally only, as we have been for so long, which is the United States" [6].

Gen. Alexus Grynkewich, the US European Command and NATO Supreme Allied Commander, offered the most concrete assessment. He stated the current reductions would not harm NATO's defensive posture on the eastern flank, but warned: "Over the longer term, we absolutely should expect additional [redeployments] as Europe continues to build capability and capacity" [4].

The Cost of Commitment

Precise figures on the annual cost of the US military presence in Europe are difficult to isolate from the broader defense budget. The European Deterrence Initiative — the dedicated funding stream for rotational deployments, exercises, and infrastructure improvements — carried a fiscal year 2025 request of $2.91 billion [7]. Global overseas-base sustainment costs exceed $70 billion annually, though Europe accounts for a significant share of that figure [7].

Host-nation contributions offset some costs. A 2017 estimate found that NATO allies covered approximately $2.5 billion annually, or 34 percent of basing costs in Europe, though experts note that figure is outdated [7]. Poland has been the most aggressive in absorbing costs, investing roughly $3.6 billion to build facilities for an American Armored Brigade Combat Team and assuming responsibility for ongoing sustainment costs including fuel, electricity, and utilities [7].

The burden-sharing math has shifted dramatically. In 2014, only three NATO allies met the alliance's guideline of spending 2 percent of GDP on defense. By 2025, all allies met or exceeded that threshold — a historic first [8]. European allies and Canada spent an estimated $607 billion on defense in 2025, up from $516 billion in 2024 and $419 billion in 2023 [8]. At The Hague summit, allies committed to reaching 5 percent of GDP on combined defense and security spending by 2035, with at least 3.5 percent allocated to core defense requirements [8].

Source: European Defence Agency / SIPRI

Data as of May 22, 2026CSV

The Capability Gap: What Europe Cannot Replace

Spending more does not automatically translate into replacing what the US provides. The International Institute for Strategic Studies estimates that substituting the conventional US contribution alone would require between $226 billion and $344 billion in new systems and platforms, with lifecycle costs approaching $1 trillion [9].

The gaps are specific and structural. European NATO members lack sufficient integrated air and missile defense capability; the US-developed Patriot system and Aegis Ashore installations in Romania and Poland form the backbone of the alliance's ballistic missile defense shield [10]. Strategic airlift, intelligence-surveillance-reconnaissance platforms, and space-based capabilities remain heavily US-dependent [10]. All of NATO's top operational commands — SACEUR, AIRCOM, LANDCOM — are led by US officers, creating institutional vulnerability if American engagement recedes [10].

In raw combat mass, Bruegel, the Brussels-based economic think tank, estimates Europe needs the equivalent of 50 new brigades — roughly 300,000 additional troops' worth of mechanized and armored fighting capacity — to replace US Army heavy units [9]. Ammunition production remains a bottleneck: Europe failed to deliver a promised one million artillery shells by spring 2024, while Russia was producing approximately three million annually [10].

Germany's Sky Shield air defense initiative and multinational brigade deployments in the Baltics represent steps toward closing these gaps, but no European assessment suggests the continent can match US capabilities within a three-to-five-year timeline.

Poland and the Baltics vs. Western Europe: Two Alliance, Two Risk Calculi

The most visible fault line within NATO runs between frontline states and those with geographic distance from Russia. Poland and the Baltic states have responded to US uncertainty with a mix of alarm and accelerated self-reliance.

Polish Defense Minister Władysław Kosiniak-Kamysz maintained that the overall number of 10,000 US troops in Poland remains at acceptable levels [11]. Polish President Karol Nawrocki offered to host troops redirected from the Germany withdrawal, a bid to anchor American forces closer to the eastern flank [6]. Poland's defense spending reached 4.7 percent of GDP in 2025, the highest in the alliance [8].

For the Baltic states, the cancellation of the Poland rotation was an "alarming signal," as one analysis put it [11]. Latvia's Foreign Minister Baiba Braže acknowledged the US was reconsidering its posture but added a pointed qualifier: "for now" [1]. Baltic allies have invested in their own ground combat power, and multinational brigades now operate in all three countries, but their forces remain small relative to the Russian military district across the border.

Western European reactions have been more measured. Germany — already stung by the withdrawal being tied to Trump's personal frustration with Chancellor Merz — has focused on accelerating its own rearmament. France, which has long advocated for European strategic autonomy, has used the moment to advance proposals for closer defense integration.

The divergence is driven less by differing bilateral agreements with Washington than by geography and historical experience. Poland and the Baltics calculate threat based on proximity to Russia and living memory of Soviet occupation. For Germany and France, the threat is real but less immediate, and the institutional instinct favors building European capacity over dependence on a single ally — even one as powerful as the United States.

The Steelman Case for Withdrawal

The argument that reduced US commitment would strengthen NATO over time is not confined to the Trump administration's talking points. A credible version exists among European strategists and some American defense analysts.

US Secretary of Defense Pete Hegseth put it bluntly: "Now is the time to invest because you can't make an assumption that America's presence will last forever" [12]. The 2026 National Defense Strategy made the logic explicit, ranking deterring China as the top priority and designating Europe as a secondary theater [12].

Proponents point to the spending data as evidence. European defense investment stagnated for two decades under the assumption that the US would always backstop the continent. Between 2014 and 2022, progress toward the 2 percent target was glacial. Russia's invasion of Ukraine accelerated spending dramatically, but the Trump administration's unpredictability has driven it further — EU member states spent €343 billion on defense in 2024, a 19 percent increase over 2023, with projections of €381 billion for 2025 [12].

The counterargument is equally forceful. The Hudson Institute warned that reducing the US force presence "would weaken American interests" by ceding influence in a region that remains central to the global balance of power [7]. A precipitous withdrawal could invite Russian aggression before European capacity catches up, creating a window of vulnerability that no amount of future spending could retroactively close.

Historical Precedent: The 1990s Drawdown

The current moment has a direct antecedent. After the Cold War ended, the US slashed its European force from 300,000 to roughly 75,000 by the mid-1990s — a reduction far more dramatic than anything currently proposed [3].

The consequences were mixed. The "peace dividend" allowed governments on both sides of the Atlantic to redirect resources, and no major interstate conflict erupted in Europe during the drawdown period. But European militaries atrophied badly. When crises emerged in the Balkans, European allies proved incapable of mounting effective military operations without US leadership, logistics, and firepower. The US ended up returning forces and leading NATO interventions in Bosnia and Kosovo [13].

The lesson most frequently drawn is that drawdowns are manageable when the security environment is benign, but the current environment — with an ongoing war in Ukraine, Russian nuclear saber-rattling, and instability across NATO's southern flank — bears little resemblance to the early 1990s. US Army Europe faced "different challenges" even during the post-Cold War lull, including humanitarian operations and peacekeeping missions that strained reduced forces [13].

The Nuclear Question

The most consequential long-term implication of reduced US conventional commitment is its effect on nuclear deterrence. The US currently maintains approximately 100 B61 tactical nuclear weapons at bases in Belgium, Germany, Italy, the Netherlands, and Turkey as part of NATO's nuclear-sharing arrangement [14].

If US extended deterrence — the promise to use American nuclear weapons in defense of allies — loses credibility, Europe faces a narrow set of options. France holds fewer than 300 warheads and the UK under 250, compared to 1,700 deployed US warheads [14]. A CSIS analysis concluded that "Franco-British nuclear protection would not constitute a viable solution in the event of an abrupt withdrawal of U.S. nuclear forces" [14].

Yet the conversation has already shifted. French President Macron's announcement of "forward deterrence" — inviting eight allied nations to participate directly in French nuclear operations — marked the first time Paris opened its nuclear posture to allied participation [15]. The 2025 UK-France Northwood Declaration advanced closer nuclear coordination between Europe's two nuclear powers [15]. Germany established a Franco-German high-level steering group on nuclear deterrence in 2026, and Poland, the Netherlands, Belgium, Denmark, Sweden, and Greece have expressed varying degrees of interest [15].

The Munich Security Conference's European Nuclear Study Group warned in February 2026 of a growing "deterrence gap" and urged European leaders to prepare contingency plans [15]. For now, reinforcing the nuclear status quo within NATO remains the default position — but as the study group noted, it may be the default "merely because all other options seem more dangerous, more expensive, and less feasible."

What Comes Next

The Trump administration's Poland announcement offers temporary relief but resolves nothing structurally. No binding commitment on troop levels exists. The 76,000-troop consultation threshold provides a legal floor, but it can be changed. And the administration's own defense strategy explicitly deprioritizes Europe.

The question facing NATO is whether the current surge in European defense spending — real and substantial though it is — can close the capability gap before American commitment erodes further. The IISS estimate of $1 trillion in lifecycle costs to replace US conventional contributions suggests the timeline is measured in decades, not years [9].

For frontline states like Poland and the Baltics, the math is existential. For Western European capitals, it is a question of political will and industrial capacity. And for Washington, the fundamental tension between maintaining global influence and reducing overseas commitments remains unresolved — a tension that ten days of contradictory troop announcements made impossible to ignore.