Running on Empty: How America's Defense Reallocations Are Reshaping Global Security
LodiEye Analysis
Running on Empty: How America's Defense Reallocations Are Reshaping Global Security
US interceptor shortages, allied arms races, and the specter of nuclear proliferation
Summary
The United States is simultaneously fighting a war against Iran, asserting military dominance over the Western Hemisphere under a revived Monroe Doctrine, and telling its most important allies in Europe and Asia to shoulder their own defense. Each of these missions is consuming irreplaceable weapons at rates that dwarf American production capacity. The cascading consequences — for US defense costs, allied procurement decisions, and the global architecture preventing nuclear proliferation — may prove to be the most significant strategic shift since the end of the Cold War.
This analysis examines the specific weapon systems being moved, the industrial crisis underneath the headlines, and what it all means for a world that has relied on American military guarantees for 75 years.
The Reallocations: What Has Moved and From Where
From South Korea to the Middle East
In early March 2026, the US Army began transferring components of its Terminal High Altitude Area Defense (THAAD) anti-ballistic missile system from South Korea to the Middle East. The Pentagon also pulled Patriot interceptor missiles from the Indo-Pacific region. South Korean media documented C-5 Galaxy and C-17 Globemaster III transport aircraft at Osan Air Base — planes specifically configured to carry these defense systems.
South Korean Foreign Minister Cho Hyun confirmed that Washington was in active discussions with Seoul about redeploying Patriot air defense batteries to the Middle East. President Lee Jae Myung acknowledged the transfers during a cabinet briefing, stating bluntly: "While we have expressed opposition, the reality is that we cannot fully push through our position."
From Europe to the Middle East
F-15E Strike Eagle fighter jets were relocated from RAF Lakenheath in the United Kingdom to Muwaffaq Salti Air Base in Jordan. The aircraft carrier USS Abraham Lincoln and its strike group were redirected from the South China Sea to the Arabian Sea. B-1B Lancer and B-52H Stratofortress strategic bombers have been rotating through Al Udeid Air Base in Qatar.
The Western Hemisphere Buildup
The 2026 National Defense Strategy, released January 23, declares that "the U.S. military's foremost priority is to defend the U.S. Homeland," including by "defending America's interests throughout the Western Hemisphere." Branded the "Trump Corollary" to the Monroe Doctrine, this framework has driven the January 2026 capture of Venezuelan President Nicolás Maduro, $1.5 billion in military sales to Peru for naval upgrades, new basing access in the Dominican Republic, and expanded naval counter-narcotics operations across the Caribbean.
The Interceptor Crisis: By the Numbers
The reallocations are not a choice freely made — they are driven by an acute shortage of missile defense interceptors that constitutes the most serious industrial vulnerability in the US defense posture.
The Burn Rate
During Israel's Twelve-Day War with Iran in June 2025, US forces fired more than 100 — and possibly as many as 150 — THAAD interceptors. That represented roughly 25 percent of the entire US inventory built over the life of the program. As of December 2025, the Missile Defense Agency's arsenal stood at approximately 534 THAAD interceptors and 414 SM-3 interceptors. The current Iran war, now in its third week, has consumed substantial additional stocks.
US Missile Defense Interceptor Snapshot
| System | Inventory (Dec '25) | Annual Production | Est. Consumed (2025–26) |
|---|---|---|---|
| THAAD | ~534 | 11–96* | 200–300+ |
| SM-3 (IB/IIA) | ~414 | ~36 | 80+ |
| Patriot PAC-3 MSE | Classified | ~550 | Hundreds |
* Production ramping from 96 toward a target of 400/year under new Lockheed Martin contract. Full ramp-up expected over 6–7 years.
The Production Gap
In fiscal year 2025, the United States procured just 11 new THAAD interceptors. The FY2026 budget funds only 37. Each THAAD interceptor costs $12.7–$15 million. Each AN/TPY-2 radar — several of which have been damaged or destroyed in the Iran conflict — costs several hundred million dollars.
The Pentagon has signed a framework agreement with Lockheed Martin to quadruple THAAD production from 96 to 400 per year, and a separate seven-year deal to ramp PAC-3 Missile Segment Enhanced production from 550 to 2,000 per year. But as defense analysts have emphasized, these expansions are aspirational timelines, not current reality.
The fundamental problem is scale. Production lines were designed for peacetime assumptions. Scaling them to wartime consumption rates requires workforce expansion, new factory lines, and sub-tier supplier capacity that takes years to build. Meanwhile, the burn rate in active conflict continues daily.
The Cost Spiral
The economics of advanced weapons manufacturing depend heavily on production volume. When orders are uncertain and quantities small, unit costs escalate dramatically. The SM-3 Block IB interceptor provides a cautionary example: unit costs rose from approximately $9 million in FY2021 to nearly $24 million for supplemental missiles procured in FY2024 — a 167% increase driven by production uncertainty rippling through the supply chain.
This dynamic creates a vicious cycle. As allies reduce purchases of US systems, production volumes shrink, fixed costs are spread across fewer units, and per-unit prices rise — making US systems even less competitive against emerging alternatives.
The "Allied Stockpile Buffer" Is Gone
For decades, the United States treated allied inventories of US-made systems as a de facto strategic reserve. When a crisis erupted, Washington could pull Patriot batteries from South Korea, THAAD components from other theaters, or interceptors from NATO countries, knowing that allied stocks were essentially fungible with American ones. This model is breaking down in three ways simultaneously.
First, allies are resisting transfers. South Korea's grudging acquiescence to the THAAD move — coupled with explicit statements of opposition — signals that future cooperation on such transfers cannot be assumed.
Second, allies are diversifying away from US systems specifically so they cannot be raided. South Korea's domestically developed Cheongung surface-to-air missile system reportedly saw its first combat operations when the United Arab Emirates deployed it against Iranian projectiles in late February 2026. This is a powerful advertisement: indigenous systems cannot be recalled by Washington.
Third, allies who still use US systems are burning through their own stocks. Israel informed the US this week that it is running critically low on ballistic missile interceptors. Gulf state allies cannot produce their own interceptors and are consuming them at rates their inventories cannot sustain. These countries, once a potential source of redistributed American missiles, are now competing with Washington for the same scarce production capacity.
The Allied Procurement Pivot: Who Is Buying What
Europe: The Most Dramatic Shift
The European Union has unveiled an €800 billion ($860 billion) defense plan that requires 55 percent of all military purchases to come from European factories by 2030. Germany's procurement plan includes 154 major defense acquisitions through 2026, with only 8 percent going to US suppliers — a dramatic reversal from recent years when Berlin was one of Washington's biggest defense customers.
The rationale is as much operational as political. European officials cite the need for weapons that come without restrictions on how they can be used, pointing to Ukraine's experience with US-imposed conditions on weapon employment. Concerns about potential US "kill switches" embedded in platforms like the F-35 fighter jet have accelerated demand for sovereign alternatives.
Key European indigenous programs gaining momentum include the IRIS-T air defense system (German-led), the Eurofighter Tranche 5 fighter, a European Drone Defense Initiative with initial capacity by late 2026, a European Air and Space Shield targeted for mid-2026, and the Global Combat Air Programme sixth-generation fighter co-developed by the UK, Italy, and Japan.
Remarkably, the Pentagon has accepted this shift. Under Secretary of Defense for Policy Elbridge Colby told the Munich Security Conference in February: "If countries spend 3.5% or 5% on defense, we understand that you're going to need to indigenize a large fraction of that production."
South Korea: Already a Major Producer
South Korea is arguably the best-positioned ally to pivot away from US dependence. President Lee has declared the country will "establish technological sovereignty by focusing investment on technologies, parts, and materials that must be secured independently." South Korean defense procurement policy already requires an 80/20 split between local and foreign products.
The country produces its own main battle tanks (K2 Black Panther), self-propelled howitzers (K9 Thunder, a major export success to Poland and elsewhere), a next-generation fighter (KF-21 Boramae, approaching mass production in 2028), and the Cheongung air defense system now proven in combat. South Korea aims to become the world's fourth-largest defense power by 2030.
Japan: Slow but Accelerating
Japan plans to release its first-ever defense industry strategy by the end of 2026. Prime Minister Takaichi has moved aggressively to jumpstart Japan's arms industry and enter the export market. Japan is co-developing a sixth-generation fighter with the UK and Italy — pointedly not with the United States — while domestically producing long-range Type 12 missiles.
Japan's shift toward indigenous production is rooted in long-standing frustration with the US Foreign Military Sales program, described by defense analysts as plagued by delays and subject to shifts in Washington's priorities.
Gulf States: Forced Diversification
The Gulf states are the most immediately constrained by the interceptor crisis. The UAE's combat deployment of South Korea's Cheongung system against Iranian missiles is a landmark: it proves non-US air defense systems can perform in high-intensity scenarios and opens the door to massive future orders from Korean, European, and Israeli manufacturers.
The Economic Feedback Loop
The shift in allied procurement creates a self-reinforcing cycle that threatens the long-term viability of the American defense industrial base.
The Defense-Industrial Feedback Loop
| Step | Dynamic |
|---|---|
| 1 | Allies shift procurement from US to indigenous/European systems |
| 2 | Reduced production volumes drive up US per-unit costs (SM-3: $9M → $24M) |
| 3 | Higher unit costs mean fewer weapons purchased for the same Pentagon budget |
| 4 | Smaller US inventories eliminate the ability to share with allies in future crises |
| 5 | Allies unable to count on US protection or supply pursue the ultimate insurance: nuclear weapons |
Between 2020 and 2024, European NATO members more than doubled their weapons imports, with the United States supplying 64 percent of the total. US Foreign Military Sales notifications to European countries reached $76 billion in 2024, four times the historical European average since 2008. If the EU achieves its 55 percent European-content target by 2030, American manufacturers stand to lose tens of billions in annual revenue.
That revenue loss has direct consequences for the Pentagon. Missile production involves enormous fixed costs — specialized tooling, secure facilities, trained workforces, and sub-tier supplier relationships. When total production quantities shrink, those fixed costs are distributed across fewer units, driving prices upward. The very allies whose orders once helped sustain affordable unit costs are now building competing production lines.
European defense firm revenues are estimated to grow 10–11.5 percent annually, outpacing US projections. South Korean, Turkish, Japanese, and Australian defense stocks are also rising as global demand for non-US alternatives surges. These competitors gain the scale advantages that American manufacturers are losing.
The Pentagon's aspiration to dramatically ramp production faces a fundamental constraint: the same industrial base that struggles to scale 155mm artillery shell production — a relatively simple munition — is being asked to quadruple output of systems that are orders of magnitude more complex. The $25 billion allocated for munitions in the reconciliation bill is a start, but experts question whether the money can translate into physical missiles on timelines that matter.
Financial Projections: The Cost to US Industry (2026–2032)
In FY2024, total US Foreign Military Sales reached a record $117.9 billion — a 45.7 percent increase over the prior year. Direct Commercial Sales authorizations hit $200.8 billion. Combined, US arms transfers represented the highest annual totals ever recorded. But these peak numbers may mark an inflection point rather than a new baseline. The structural forces driving allied procurement away from US systems are now moving faster than the diplomatic forces that once kept allies buying American.
The European Revenue Cliff
Europe has been the fastest-growing market for US defense firms. FMS notifications to European countries surged from an average of $11 billion per year (2017–2021) to $76 billion in 2024 — a nearly sevenfold increase driven by F-35 orders, Patriot systems, and HIMARS procurements. Poland alone accounted for $55 billion in FMS notifications from 2022 to 2024.
But the EU's €800 billion ReArm Europe plan, with its 55 percent European-content requirement by 2030, will progressively redirect this revenue to European manufacturers. Germany's procurement plan already directs only 8 percent of an $83 billion annual budget to US suppliers. The EU's Security Action for Europe (SAFE) program — €150 billion in preferential loans — explicitly restricts eligibility for non-European firms.
Projected US Foreign Military Sales Revenue by Region
| Region / Market | Peak FMS (2024) | Est. 2028 | Est. 2032 | At-Risk Revenue |
|---|---|---|---|---|
| Europe / NATO | $76B | $45–55B | $30–40B | $25–40B/yr |
| Asia-Pacific Allies | ~$20B/yr | $14–18B | $8–14B | $8–15B/yr |
| Middle East / Gulf | ~$25B/yr | $18–22B | $15–20B | $5–10B/yr |
| Total At-Risk | $117.9B total | $38–65B/yr |
Sources: US State Dept FMS data (FY2024), Bruegel FMS database, SIPRI. Projections based on EU 55% European-content targets, South Korean 80/20 procurement rules, and Gulf state diversification trends.
The Asia-Pacific Diversification
Between 2020 and 2024, new FMS agreements with Australia ($23.3 billion), Japan ($22.5 billion), Taiwan ($22.2 billion), and South Korea ($13 billion) totaled over $81 billion. South Korea's 80/20 domestic-to-foreign procurement ratio, Japan's forthcoming defense industry strategy, and the combat validation of South Korean systems like the Cheongung all point toward declining US market share in the region.
The Munitions Cost Multiplier
The interceptor cost spiral is not an isolated phenomenon — it is a preview of what happens across the entire US munitions portfolio when export volumes contract while wartime demand surges. In the current production environment, the US can produce approximately 550 PAC-3 MSE interceptors per year. Of that, the Army purchases 224 and the remainder goes to foreign buyers. If allied orders shrink, the Pentagon faces a stark choice: absorb the full fixed cost of the production line by buying more domestically (at higher per-unit prices), or allow the line to slow.
Aggregate Projections: 2026–2032
The overall US aerospace and defense market is projected to grow from $463 billion in 2026 to $610 billion by 2031, driven primarily by domestic Pentagon spending at a compound annual growth rate of 5.7 percent. Total US defense spending is projected to reach $1.018 trillion by 2030. But these topline figures mask a structural rebalancing: while domestic revenues grow modestly, the export portfolio faces significant headwinds.
European defense firm revenues are growing at 10–11.5 percent annually, outpacing US projections. Turkey's defense exports hit a record $7.1 billion in 2024, and South Korean firms like Hanwha, Korea Aerospace Industries, and LIG Nex1 are winning contracts that would have gone to Lockheed Martin, Raytheon, or Boeing just five years ago.
Aggregate Financial Impact: US Defense Industry 2026–2032
| Category | Estimated Range | Timeframe |
|---|---|---|
| Cumulative FMS export revenue loss vs. 2024 baseline | $100–200B | 2026–2032 |
| Interceptor stockpile replenishment cost | $10–17B | 2026–2031 |
| Offensive munitions replenishment (Iran/Hemisphere ops) | $8–15B | 2026–2030 |
| Unit cost inflation from reduced export volumes | 15–40% increase | By 2030 |
| Additional annual Pentagon spending to reach 3.5% GDP | ~$400B/yr | By 2035 |
| European defense industry revenue growth rate | 10–11.5% annually | 2025–2030 |
| US A&D domestic market growth (CAGR) | 5.7% | 2026–2031 |
| US A&D domestic market size projection | $463B → $610B | 2026–2031 |
| Total US defense spending projection | $893B → $1.018T | 2026–2030 |
Sources: US State Dept, Mordor Intelligence, GlobalData, TD Economics, CSIS, Bruegel, Stimson Center, Deloitte. Red figures indicate costs/losses; blue indicates competitor growth.
The Stockpile Replenishment Bill
Rebuilding depleted interceptor stocks alone carries enormous costs. Replacing 200–300 THAAD interceptors at $13–$15 million each requires $2.6–$4.5 billion. Replacing SM-3 interceptors at their current inflated costs of up to $24 million each adds billions more. Patriot PAC-3 MSE replenishment could require an additional $5–$8 billion. Replacing destroyed THAAD AN/TPY-2 radars adds further costs. Combined, munitions replenishment for just the interceptor categories could approach $15–$25 billion over the next five years.
Interceptor Stockpile Replenishment: Estimated Costs and Timelines
| System | Units Depleted | Unit Cost | Repl. Cost | Annual Prod. | Recovery Time |
|---|---|---|---|---|---|
| THAAD | 200–300+ | $13–15M | $2.6–4.5B | 96 (→400)* | 3–5 years |
| SM-3 (IB/IIA) | 80–120+ | $9–24M | $1.5–2.9B | ~36 | 3–4 years |
| Patriot PAC-3 MSE | Hundreds | $3.8M | $5–8B | 550 (→2,000)* | 2–4 years |
| AN/TPY-2 Radars | 2–3 | $300–500M ea. | $0.6–1.5B | Limited | 2–3 years |
| TOTAL | $10–17B |
* Target production rates under new Lockheed Martin framework agreements; full ramp-up over 6–7 years. Depletion figures include June 2025 Twelve-Day War, ongoing Iran conflict (Operation Epic Fury), and transfers to allies.
Meanwhile, achieving the NATO defense spending target of 3.5 percent of GDP would require approximately $400 billion in additional annual appropriations — an increase that economists describe as extremely challenging given projected growth in entitlement spending and the rising cost of servicing the $36 trillion national debt.
The paradox is clear: The United States needs to spend more on defense to replenish what it has consumed, but it will collect less from allies to offset those costs, while the allies who once helped subsidize American production lines are building their own. The era of allied purchases underwriting US defense affordability is ending.
The Nuclear Proliferation Cascade
All of these dynamics converge on the most dangerous question of the emerging era: which allies will decide that conventional defense, however self-reliant, is insufficient — and that only nuclear weapons provide genuine security?
A February 2026 analysis from Just Security concluded: "After decades of relative success at preventing more countries from acquiring nuclear weapons, the world faces a perfect storm for that progress to be reversed."
South Korea: Highest Risk
In November 2025, the Trump administration announced it would support South Korea's pursuit of civil uranium enrichment and spent fuel reprocessing. Analysts warn that once South Korea possesses the capability to produce weapons-grade nuclear materials, it would be extraordinarily difficult to prevent a rapid weapons program if Seoul's leadership changes course. Public polling consistently shows approximately 70 percent support among South Koreans for an independent nuclear deterrent.
The THAAD withdrawal from the Korean Peninsula is the most concrete signal yet that Washington will prioritize its own operations over allied protection. Combined with the transactional approach to alliances, analysts at the Stimson Center note that "allied confidence in US extended nuclear deterrence has been eroded."
Saudi Arabia: Close Behind
The United States appears likely to support Saudi efforts to acquire fissile material production capabilities in 2026, despite Saudi threats to build nuclear weapons to match any Iranian nuclear deterrent. The ongoing Iran war makes this calculus more acute: Saudi Arabia is expending US-made interceptors it cannot replace fast enough, against an adversary that was racing toward nuclear capability before hostilities began.
Europe: A Longer Horizon but a Real Debate
German Chancellor Friedrich Merz, Polish Prime Minister Donald Tusk, and other leaders have raised the once-unthinkable question: what happens if the United States cannot be relied upon for extended nuclear deterrence? France and the United Kingdom maintain independent nuclear arsenals, but these are designed for national deterrence, not for protecting all of Europe.
The European Nuclear Study Group's February 2026 report examines scenarios for expanding French and British nuclear coverage across the continent — a political and financial transformation that would have been inconceivable just five years ago. Some analysts warn that frontline states like Poland may eventually contemplate independent nuclear options if existing guarantees continue to erode.
Japan: Constrained but No Longer Taboo
Japan's constitutional framework and deeply rooted anti-nuclear culture remain powerful inhibitors. But the debate is no longer off-limits among senior officials and defense intellectuals. North Korea's continued nuclear progress, China's rapid arsenal expansion, and the visible hollowing-out of US extended deterrence commitments have pushed nuclear discourse into Japan's mainstream strategic conversation for the first time.
The Bigger Picture: A Self-Reinforcing Spiral
The situation forms a feedback loop that will be extremely difficult to break. The United States withdraws assets from allies to fight in the Middle East and project power in the Western Hemisphere. Allies, seeing their security guarantees hollowed out in real time, accelerate indigenous defense production and diversify procurement away from US systems. US manufacturers lose export volume, driving up per-unit costs for the Pentagon. Higher costs mean smaller American inventories. Smaller inventories mean the US has even less capacity to share with allies in future crises. And allies, now unable to count on either US-provided protection or US-supplied weapons in emergencies, pursue the ultimate insurance policy.
The Cheongung missile system shooting down Iranian projectiles over Dubai may prove to be the single most consequential military event of 2026 — not because of what it destroyed, but because of what it demonstrated: that the era of American monopoly on allied air defense is ending.
Since 1949, the United States has extended a nuclear umbrella over more than 30 allies and partners — a guarantee that any nation sheltering under American protection need not build its own nuclear arsenal. That bargain rested on two pillars: the credibility of Washington's commitment to defend its allies, and the physical presence of American forces and weapons systems stationed on allied soil as tangible proof of that commitment. Both pillars are now cracking simultaneously. The THAAD batteries pulled from South Korea, the F-15s relocated from Britain, the carrier strike groups diverted from the Pacific — these are not abstract policy shifts. They are the visible withdrawal of the hardware that made extended deterrence real.
The nations now recalculating their security are not rogue states or aspiring aggressors. They are America's closest partners: South Korea, with 70 percent public support for an independent nuclear weapon and a newly US-backed path to uranium enrichment. Saudi Arabia, burning through irreplaceable interceptors in a war against a near-nuclear adversary. Japan, drafting its first defense industrial strategy while watching its alliance partner strip assets from the region. Poland and Germany, debating whether French and British warheads can substitute for an American guarantee that feels increasingly conditional.
The Non-Proliferation Treaty, signed in 1968, was built on the premise that the security benefits of American alliance would outweigh the security a nation could provide for itself with nuclear weapons. For 75 years, that math held. The question now is whether it still does — not because any single ally has decided to go nuclear, but because the industrial, financial, and strategic conditions that made the American guarantee credible are eroding faster than anyone in Washington appears willing to acknowledge.
If even one major ally crosses the nuclear threshold — and the conditions for South Korea or Saudi Arabia to do so have never been more favorable — the precedent will reshape the international order far more profoundly than any single war. Every nation with the technical capacity and a plausible security rationale will face the same calculus. The architecture that held proliferation in check was never primarily about treaties or inspections. It was about trust — trust that America would be there, with real weapons, in real time, when it mattered. That trust is now the scarcest commodity in the global arsenal.
Sources & References
- CNBC — South Korea opposed to US moving air defense systems to Middle East (March 2026)
- Newsweek — Iran Scores a Victory as US Forced to Take THAAD From Asia (March 2026)
- Wikipedia — 2026 US Military Buildup in the Middle East
- CSIS — The Depleting Missile Defense Interceptor Inventory (December 2025)
- Military Times — 'Race of attrition': US interceptor stockpile tested (March 2026)
- CNN — US used ~25% of THAAD interceptors during Israel-Iran war (July 2025)
- Semafor — Israel running critically low on interceptors (March 2026)
- Courthouse News — Europe's $860B defense plan freezes out US contractors
- Defense News — Pentagon blesses Europe's push to spend defense money at home (Feb 2026)
- Defense One — Several trends shifting defense tech toward Europe (Feb 2026)
- Bruegel — Europe's dependence on US foreign military sales (March 2026)
- Just Security — In 2026, A Growing Risk of Nuclear Proliferation (Feb 2026)
- Stimson Center — Denuclearization and Risk Reduction in North Korea Engagement (March 2026)
- Carnegie Endowment — Unpacking Europe's Deterrence Dilemmas (Dec 2025)
- USNI News — 2026 US National Defense Strategy (Jan 2026)
- Small Wars Journal — Operationalizing Hemispheric Defense (Feb 2026)
- Responsible Statecraft — US depleted missiles, now wants more fast
- 19FortyFive — 'Full-blown Crisis': US running out of missile defenses (March 2026)
- Mordor Intelligence — US Aerospace and Defense Market Size & Projections
- TD Economics — Economic & Fiscal Impacts of US Defense Spending (2026)
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