--- title: "The Interceptor Gap: How America's Missile Defenses Ran Dry" description: "According to the Wall Street Journal, some Trump administration officials have privately assessed that the United States could no longer fully execute its contingency plans to defend Taiwan. That conclusion has nothing to do with anything China did. It is a consequence of what just got fired off in the Persian Gulf.\n\nIn a few weeks of war with Iran, the United States and its allies burned through more interceptors than the entire global production base can replace in years. The systems that are supposed to protect cities from incoming missiles—in Seoul, in Riyadh, in Tel Aviv, across nearly two dozen countries—all run on the same American supply chain. And that supply chain was already struggling before the Middle East went to hell.\n\nFor most of the last three decades, missile defense was one of those things that quietly worked. It was the reason skyscrapers kept going up in places that sit within range of people who would rather they did not. What happens when the ammunition runs out is a question that, until very recently, nobody seriously had to ask.\n\nFor the first time in a long time, American allies face the very real possibility that, should a vast war break out, they might be unable to properly defend themselves. The interceptor shortage is no longer a budget footnote—it is a strategic vulnerability that reaches from the Gulf to the Korean Peninsula.\n\n## Key Takeaways\n\n- By the April 8th ceasefire between the United States, Israel, and Iran, Washington had fired between 1,000 and 1,430 Patriot interceptors—roughly half its prewar stockpile—against Iranian missiles and drones.\n- A Center for Strategic and International Studies (CSIS) breakdown estimates 190 to 290 THAAD interceptors were launched out of a prewar inventory of just 360, meaning up to roughly 80 percent are gone. SM-3 stocks fell more than 30 percent and SM-6 by another 10 to 20 percent.\n- Gulf states absorbed most of the fire: the UAE burned through about three quarters of its interceptors, Saudi Arabia and Bahrain were above 85 percent, and Bloomberg reported Qatar was at one point four days from running dry.\n- Production cannot keep pace. The US makes only about 50 Patriot interceptors a month and no new THAAD interceptors have been delivered since July 2023—a roughly 30-month gap. Replacing the THAAD fired in Epic Fury alone would take about three years.\n- The industrial base has hollowed out for decades: missile propellant now comes from just two American companies, down from six, both sharing suppliers and depending on a single source for a key ignition chemical.\n- Allied alternatives are thin. Russian and Chinese systems have poor combat records, while European options like the Franco-Italian SAMP/T and Germany's IRIS-T are scaling but still produce fewer interceptors than American lines.\n- Ukraine has cracked the economics of drone defense with 3D-printed interceptor drones costing $1,000 to $2,000 apiece, but no one—including Kyiv—has yet found a cheap, scalable way to stop ballistic missiles.\n\n## Running on Empty\n\nBy the time the ceasefire took effect on April 8th, Washington had fired somewhere between 1,000 and 1,430 Patriot interceptors at Iranian missiles and drones inbound toward countries across the Gulf and beyond—roughly half its prewar stockpile. Patriot is the most well-known of these systems, but it is just one layer of a broader ecosystem that the US and its allies rely on to shoot down threats at various altitudes and speeds.\n\nAcross other interceptor categories, the picture was broadly similar or worse. A recent CSIS breakdown puts US expenditure of THAAD at between 190 and 290 launched out of a prewar inventory of just 360. At the upper bound, that means roughly 80 percent are gone. SM-3 interceptors fared similarly, with more than 30 percent of the prewar stockpile expended, and SM-6 stocks were drawn down by another 10 to 20 percent on top of that.\n\nIt gets worse when you look at the Gulf states themselves, which absorbed most of the incoming fire. The UAE, on the receiving end of nearly half of all of Iran's strikes, had burned through roughly three quarters of its entire interceptor stockpile. Saudi Arabia and Bahrain were north of 85 percent, and a Bloomberg estimate held that Qatar was, at one point, just four days from running dry.\n\n## Finishing One War, Unready for the Next\n\nThe Pentagon and White House have both closed ranks to insist they have more than enough to last out whatever Iran might throw at the region, and there is reason to believe them. Early-war concerns about the Gulf monarchies running completely dry were rendered largely moot once airstrikes brought down the rate of Iranian launches by an estimated 90 percent by the end of the first month.\n\nBut finishing this war—whatever that means at this point—is entirely different from being ready for the next one. These stockpiles were not full to begin with. The US had already transferred more than 600 Patriot interceptors to Ukraine and other allied states since 2022, a drawdown that was quietly getting attention in Washington. It was last summer's 12-day war, codenamed Operation Rising Lion, that turned that attention into genuine alarm.\n\nTo block Iranian missiles during that conflict, the US launched roughly 150 THAAD interceptors—about a quarter of Washington's entire supply—along with another 80 standard missile interceptors. By the time Epic Fury started eight months later, not a single one of them had been replaced. It was clear the US, and by extension most of its allies, was in tough shape on supplies. The question was how fast they could build more.\n\n## The Production Math Does Not Add Up\n\nHere things go from concerning to terrifying. These interceptors are not thrown together on an assembly line in an afternoon. Each is a high-tech guided missile in its own right, with components that take over a year to manufacture from start to finish.\n\nThe US domestically produces only about 50 Patriot interceptors a month. For context, US forces fired around 400 in the first 16 days of Epic Fury alone—consuming in less than a month what the production line puts out in roughly eight. THAAD is worse. According to CSIS's Wes Rumbaugh, no new THAAD interceptors had been delivered to US inventory since July 2023, a 30-month production gap that predates the war entirely. Even now, production sits under a hundred a year. At that rate, replacing just the interceptors expended in Epic Fury takes three years—assuming none get fired off in the meantime.\n\nPart of this comes down to budget priorities and political will. For most of the post-Cold War period, missile defense was built around a different threat model: a small number of high-end ballistic missiles in a brief, decisive exchange, with interceptors as a last resort. Some of these systems, like Patriot, date back to the 1970s, when the concern was stopping an all-out Soviet strike. The drone-and-missile barrage that now defines every Middle East conflict, and the skies over Ukraine, simply was not on anyone's radar.\n\n## A Hollowed-Out Industrial Base\n\nEven once the political will is found, that only clears one barricade. You still have to find places and companies with both the setups and the sophistication to build these weapons—and the industrial base meant to do it has been hollowing out for decades. The propellant systems that make these missiles fly are now produced by just two American companies, down from six. Both share suppliers, and both depend on a single source for one of the key chemicals the propellant needs to ignite.\n\nDespite this, Washington has been trying to ramp up production since well before Epic Fury kicked off. The Pentagon signed multiple framework agreements earlier this year targeting three to four times current output across every major interceptor category, broke ground on a new munitions facility in Arkansas in January, and brokered a $500 million deal with Honeywell to surge component production.\n\nEven so, this is a massive uphill battle on end-of-decade timelines, not the next few months. With supplies this tight, the government has reportedly called in companies from GM to Ford to GE to discuss converting civilian manufacturing plants into at least partial missile-component production facilities. By all accounts, it was the first time Washington had asked automakers to consider retooling for munitions since the Second World War—a fact that probably tells you everything about how the people running this privately understand the hole they are in.\n\n## Shopping Elsewhere\n\nIf you are watching from outside the United States or the Middle East, you might think none of this is your problem. It very much is. Around two dozen countries run their primary missile defense on US-made interceptors. Outside of Japan, where Mitsubishi license-builds Patriots under a decades-old arrangement, every major US-aligned air defense architecture in the world depends on a supply chain that largely runs through Arkansas, Arizona, and Alabama. For those countries, there is no second source.\n\nDuring Epic Fury, that arrangement was stress-tested, and the results were not reassuring. As many as 48 THAAD interceptors were reportedly pulled from South Korea and moved to the Middle East in March. Seoul almost certainly fought the move, but as President Lee Jae Myung told a cabinet meeting on March 10: \"While we have expressed opposition… the reality is that we cannot fully impose our position.\"\n\nThat leaves countries like South Korea with an obvious question: if you cannot count on Washington to leave your interceptors where they are, who else can you buy from? There are some alternatives, but none with a track record you would want to bet your country's defense on.\n\n## The Limits of Russian and Chinese Air Defense\n\nIran built nearly its entire air defense architecture around Russia's S-300, which Moscow has exported to some 20 countries over the decades, including Venezuela. The results speak for themselves. Tehran later tried to develop its own domestic system, the Bavar-373, which has not fared much better—though Iran claimed it downed a US F-15 in early April.\n\nRussia's updated S-400 supposedly fixes all this. It has outperformed the S-300, but largely by clearing possibly the lowest threshold imaginable, and not by much. Deployed against Ukraine, Kyiv has destroyed multiple S-400 batteries and flown both drones and Storm Shadow cruise missiles through S-400 coverage zones, often without issue. India is the one outlier, having relied heavily on Russian hardware and claimed the system held up well against the Pakistani military last year.\n\nChina's main export offering, the HQ-9, has a similar reputation. In that same confrontation between Pakistan and India, Beijing backed Pakistan—and it did not much matter, as Indian strikes reportedly penetrated Pakistani air defenses with relative ease. Neither record comes with a ringing endorsement, and that assumes buyers would want these systems in the first place. The political costs of siding with Moscow or Beijing are mounting. Turkey is a case study: a NATO member, it bought Russian S-400 systems, drew swift sanctions, and was expelled from the F-35 program in 2019.\n\n## Europe Steps In, Slowly\n\nSo if Russian and Chinese systems cannot do the job, what is actually available? Denmark answered in April by becoming the first export customer for a joint Franco-Italian system—a deal Danish defense officials explicitly framed around US delivery timelines being too long. The system enters service this year, and its manufacturer is targeting production above 300 interceptors a year by 2028, up from somewhere around 80 to 100 in 2024.\n\nGermany's IRIS-T family, which Ukraine has used to good effect, is scaling too. A new facility opened in January, but roughly three quarters of current production is going to Ukraine, which is itself delaying Germany's own buildup. So in a small number of cases there are alternatives—but they are either untested or have even lower interceptor production than American systems.\n\nThat leaves the biggest question of all: how did the United States, of all countries, end up this unprepared?\n\n## How the Rules Changed\n\nNone of this used to be a crisis, even with low interceptor production. It simply was not assumed you would ever need vast numbers of them. During the 1991 Gulf War, Saddam Hussein fired roughly 88 Scud missiles at Israel and Saudi Arabia over six weeks, and that was considered an extraordinary provocation. The good old days.\n\nThe reason was cost. Researching, designing, and producing large-scale ballistic missiles that could actually reach their targets was something only a handful of countries could manage as late as the 1990s. Today it is another world. A single Iranian Shahed drone now costs somewhere between $20,000 and $50,000 per unit. There are cheap alternatives for downing drones—just ask the Ukrainians—but not every country has invested in them. That is how the wild sight emerged of Bahrain and others using multimillion-dollar interceptors to shoot down drones assembled for a fraction of the cost.\n\nMore relevantly, more nations now make at least halfway decent ballistic missiles in large numbers. The key factor is again cost. It is dramatically easier to shoot something in the general direction of your enemy and hope for the best than to track an incoming threat, analyze its precise path, calculate the trajectory to intercept it, and launch—all while course-correcting for variations mid-flight. Offense has become cheap; defense has stayed expensive.\n\n## Ukraine Writes the New Playbook\n\nThis was not quite the overnight shift it might seem. Ukraine has been at the forefront of this new kind of war for four years. Russia, a longtime ally of the Islamic Republic, has launched thousands of Shahed-type drones and its own cruise missiles at Ukrainian cities and infrastructure, and the interceptor math got ugly fast. It is simply not sustainable to shoot million-dollar interceptors at $20,000 drones, and neither the US nor Europe has been able to keep pace with the resupply numbers needed.\n\nKyiv, depending on these defenses, got very good at its own version of counter-drone warfare. Ukraine's system uses 3D printers to mass-produce interceptor drones that chase down and ram the Shahed for between $1,000 and $2,000 apiece. By early 2026, Ukraine's armed forces were receiving more than 1,500 of them a day—and unlike the expensive, clunky Russian or Chinese interceptors, these boasted a success rate north of 70 percent.\n\nSo when Epic Fury began and the Gulf faced running out of American ammunition, Kyiv was the capital they called. By the end of March, Zelensky was in Saudi Arabia signing ten-year defense cooperation agreements with both the Kingdom and Qatar, with the UAE expected to follow. It is a genuine breakthrough that Washington and the wider world should be watching more closely. But this new approach is limited to drone attacks. For all their ingenuity, the Ukrainians have not yet found a cheap, scalable way to stop ballistic missiles. On that front, we are right back to square one.\n\n## The Allies Who Built Their Own—and Still Buckled\n\nOn the interceptor side, there is some hope coming out of Japan. Mitsubishi has built Patriots under license for years, but postwar export restrictions meant it could not actually send them anywhere. That changed when Tokyo revised the rules in late 2023, and last year the first shipment arrived in the United States. It was only about ten missiles—a drop in the bucket—but if other allied nations with industrial capacity began producing their own interceptors under similar agreements, it might eventually lead somewhere.\n\nThe one country that has shown real independence is Israel, which spent decades and billions building the only non-American, full-spectrum missile defense architecture that has held up reliably across multiple combat crises: Iron Dome at short range, David's Sling at medium range, and Arrow at the ultra-sophisticated end. Yet even that was buckling by mid-March under the Iranian onslaught. Some estimates had Arrow down around 80 percent, with the IDF pressing lower-tier systems into roles they were never designed for.\n\nIt worked, sort of. Iranian penetration rates climbed as the war carried on, doing significant damage in a few strikes such as Dimona, but enough launchers were destroyed to end the acute phase before things got truly serious. Gambling on always being able to take out your opponent's launch infrastructure before they overwhelm your air defenses, however, is not a smart way to plan for conflict.\n\nFor most of the last three decades, the countries under America's umbrella enjoyed the luxury of treating missile defense as a given—something that just works, where a missile getting through is the exception rather than the rule. That technology has been a blessing for much of the world and has saved countless lives. But if these interceptors run out before the production lines catch up, the reality of what war really looks like is going to come crashing back down. And right now, the stats remain daunting.\n\n## Frequently Asked Questions\n\n### How many interceptors did the US fire during the war with Iran?\n\nBy the April 8th ceasefire, Washington had fired between 1,000 and 1,430 Patriot interceptors, roughly half its prewar stockpile. CSIS estimates 190 to 290 THAAD interceptors were launched from a prewar inventory of just 360, meaning up to roughly 80 percent are gone. SM-3 stocks fell more than 30 percent and SM-6 by another 10 to 20 percent on top of that.\n\n### Why can't the US quickly rebuild its interceptor stockpiles?\n\nEach interceptor is a high-tech guided missile whose components take over a year to manufacture from start to finish. The US produces only about 50 Patriot interceptors a month — a rate the first sixteen days of Epic Fury alone outpaced eightfold. No new THAAD interceptors had been delivered since July 2023, a roughly 30-month production gap predating the war entirely, and the propellant industrial base has shrunk from six companies to two, both sharing suppliers and depending on a single source for a key ignition chemical.\n\n### Why does the US interceptor shortage affect allied countries around the world?\n\nAround two dozen countries run their primary missile defense on US-made interceptors. Outside Japan, which license-builds Patriots under a decades-old arrangement, every major US-aligned air defense architecture depends on a supply chain running largely through Arkansas, Arizona, and Alabama. There is no second source, and when Washington comes up short it pulls interceptors from allied inventories — as when as many as 48 THAAD interceptors were reportedly moved from South Korea to the Middle East in March, leaving Seoul unable to fully resist the transfer.\n\n### How has Ukraine changed the economics of drone defense?\n\nUkraine mass-produces 3D-printed interceptor drones that chase down and ram incoming Shaheds for $1,000 to $2,000 apiece. By early 2026, Ukraine's armed forces were receiving more than 1,500 of them a day with a success rate above 70 percent, fundamentally altering the cost equation for drone defense. The approach is limited to drones, however — no one, including Kyiv, has yet found a cheap, scalable way to stop ballistic missiles.\n\n### Did Israel's independent missile defense architecture hold up against Iran?\n\nIsrael built the only non-American full-spectrum architecture — Iron Dome at short range, David's Sling at medium range, and Arrow at the high end — but even it was buckling by mid-March under the Iranian onslaught. Some estimates had Arrow down around 80 percent, with the IDF pressing lower-tier systems into roles they were never designed for. Iranian penetration rates climbed as the war continued, including a damaging strike at Dimona, before enough launchers were destroyed to end the acute phase.\n\n## Sources\n\n1. https://www.nbcnews.com/politics/white-house/trump-administration-order-us-manufacturers-make-munitions-iran-war-rcna261312\n2. https://jinsa.org/us-interceptors-are-depleted-making-iran-decision-difficult/\n3. https://www.semafor.com/article/03/14/2026/israel-is-running-critically-low-on-interceptors-us-officials-say\n4. https://www.wsj.com/politics/national-security/iran-war-complicates-contingency-plans-to-defend-taiwan-some-u-s-officials-say-4384f7c1\n5. https://www.csis.org/analysis/depleting-missile-defense-interceptor-inventory\n6. https://fortune.com/2026/04/24/us-military-depleted-half-most-expensive-missiles-cost-of-iran-war/\n7. https://x.com/modgovae/status/2030664175811199400\n8. https://www.defensenews.com/opinion/2025/08/18/the-urgent-need-to-procure-more-thaad-interceptors/\n9. https://www.fdd.org/analysis/2025/07/15/can-the-u-s-arm-itself-and-ukraine/\n10. https://x.com/TBowmanNPR/status/1940434066438054362\n11. https://www.wsj.com/opinion/the-case-for-cutting-off-weapons-to-ukraine-trump-russia-war-0b8311fc?st=sacCNf&reflink=article_copyURL_share\n12. https://www.fdd.org/analysis/2026/03/10/iran-war-provides-opportunity-for-russia-to-test-u-s-alaska-defenses/\n13. https://nationalinterest.org/blog/buzz/pentagon-wants-18-billion-for-golden-dome-heres-where-its-going-hk-042826\n14. https://www.fdd.org/analysis/2026/04/09/israel-partners-with-u-s-to-accelerate-arrow-interceptor-production/\n15. https://www.longwarjournal.org/archives/2026/04/irans-war-against-regional-states-uae-bore-the-brunt-iraqi-kurdistan-still-under-fire.php\n16. https://thedefensepost.com/2025/11/25/japan-patriot-interceptors-us/\n17. https://www.washingtonexaminer.com/policy/defense/4488441/south-korea-moving-air-defense-system-middle-east/\n18. https://www.stripes.com/theaters/asia_pacific/2026-03-11/thaad-south-korea-middle-east-iran-21025377.html\n19. https://missilethreat.csis.org/defsys/s-300/\n20. https://www.euronews.com/2025/12/12/iran-admits-false-claim-that-israeli-f-35-jets-were-shot-down-in-12-day-conflict\n21. https://nypost.com/2026/04/04/world-news/iran-used-new-missile-defense-system-to-shoot-down-f-15-fighter-jet-report/\n22. https://breakingdefense.com/2023/09/what-an-s-400-kill-and-a-spec-ops-raid-reveal-about-ukraines-ability-to-hit-russia/\n23. https://www.kyivpost.com/post/72869\n24. https://www.kyivpost.com/post/25764\n25. https://www.defensenews.com/air/2019/07/17/turkey-officially-kicked-out-of-f-35-program/\n26. https://www.aerotime.aero/articles/denmark-samp-t-ng-first-export-contract\n27. https://defence-blog.com/denmark-chooses-european-missile-shield-over-u-s-patriot/\n28. https://militaeraktuell.at/en/germany-bundeswehr-signs-missile-contracts-with-diehl-defence/\n29. https://www.defensenews.com/global/europe/2026/03/05/novel-interceptor-drones-bend-air-defense-economics-in-ukraines-favor/\n30. https://www.aljazeera.com/news/2026/3/28/zelenskyy-signs-air-defence-deals-with-uae-qatar-on-gulf-tour\n31. https://www.csis.org/analysis/depleting-missile-defense-interceptor-inventory\n32. https://isis-online.org/isis-reports/a-comprehensive-analytical-review-of-russian-shahed-type-uavs-deployment-against-ukraine-in-2025\n33. https://www.abc.net.au/news/2026-04-13/backyard-3d-printed-bomb-parts-helping-ukraine-war-effort/106529090\n\n" url: https://warfronts.pub/article/the-interceptor-gap-how-americas-missile-defenses-ran-dry.md canonical: https://warfronts.pub/article/the-interceptor-gap-how-americas-missile-defenses-ran-dry datePublished: 2026-06-02 dateModified: 2026-06-02 author: - name: Simon Whistler url: https://warfronts.pub/author/simon-whistler publisher: Warfronts image: "https://media.warfronts.pub/cdn-cgi/image/width=1600,height=900,fit=cover,quality=80,format=auto/articles/Ipo3ciZPycM/hero.jpg" type: NewsArticle contentHash: 4b54af1b4e879e465ecfde4a03024976c68bd525a96fe8bf6ca7a30548c0f5e0 tokens: 5822 summaryUrl: https://warfronts.pub/article/the-interceptor-gap-how-americas-missile-defenses-ran-dry.md.summary.md --- According to the Wall Street Journal, some Trump administration officials have privately assessed that the United States could no longer fully execute its contingency plans to defend Taiwan. That conclusion has nothing to do with anything China did. It is a consequence of what just got fired off in the Persian Gulf. In a few weeks of war with Iran, the United States and its allies burned through more interceptors than the entire global production base can replace in years. The systems that are supposed to protect cities from incoming missiles—in Seoul, in Riyadh, in Tel Aviv, across nearly two dozen countries—all run on the same American supply chain. And that supply chain was already struggling before the Middle East went to hell. For most of the last three decades, missile defense was one of those things that quietly worked. It was the reason skyscrapers kept going up in places that sit within range of people who would rather they did not. What happens when the ammunition runs out is a question that, until very recently, nobody seriously had to ask. For the first time in a long time, American allies face the very real possibility that, should a vast war break out, they might be unable to properly defend themselves. The interceptor shortage is no longer a budget footnote—it is a strategic vulnerability that reaches from the Gulf to the Korean Peninsula. ## Key Takeaways - By the April 8th ceasefire between the United States, Israel, and Iran, Washington had fired between 1,000 and 1,430 Patriot interceptors—roughly half its prewar stockpile—against Iranian missiles and drones. - A Center for Strategic and International Studies (CSIS) breakdown estimates 190 to 290 THAAD interceptors were launched out of a prewar inventory of just 360, meaning up to roughly 80 percent are gone. SM-3 stocks fell more than 30 percent and SM-6 by another 10 to 20 percent. - Gulf states absorbed most of the fire: the UAE burned through about three quarters of its interceptors, Saudi Arabia and Bahrain were above 85 percent, and Bloomberg reported Qatar was at one point four days from running dry. - Production cannot keep pace. The US makes only about 50 Patriot interceptors a month and no new THAAD interceptors have been delivered since July 2023—a roughly 30-month gap. Replacing the THAAD fired in Epic Fury alone would take about three years. - The industrial base has hollowed out for decades: missile propellant now comes from just two American companies, down from six, both sharing suppliers and depending on a single source for a key ignition chemical. - Allied alternatives are thin. Russian and Chinese systems have poor combat records, while European options like the Franco-Italian SAMP/T and Germany's IRIS-T are scaling but still produce fewer interceptors than American lines. - Ukraine has cracked the economics of drone defense with 3D-printed interceptor drones costing $1,000 to $2,000 apiece, but no one—including Kyiv—has yet found a cheap, scalable way to stop ballistic missiles. ## Running on Empty By the time the ceasefire took effect on April 8th, Washington had fired somewhere between 1,000 and 1,430 Patriot interceptors at Iranian missiles and drones inbound toward countries across the Gulf and beyond—roughly half its prewar stockpile. Patriot is the most well-known of these systems, but it is just one layer of a broader ecosystem that the US and its allies rely on to shoot down threats at various altitudes and speeds. Across other interceptor categories, the picture was broadly similar or worse. A recent CSIS breakdown puts US expenditure of THAAD at between 190 and 290 launched out of a prewar inventory of just 360. At the upper bound, that means roughly 80 percent are gone. SM-3 interceptors fared similarly, with more than 30 percent of the prewar stockpile expended, and SM-6 stocks were drawn down by another 10 to 20 percent on top of that. It gets worse when you look at the Gulf states themselves, which absorbed most of the incoming fire. The UAE, on the receiving end of nearly half of all of Iran's strikes, had burned through roughly three quarters of its entire interceptor stockpile. Saudi Arabia and Bahrain were north of 85 percent, and a Bloomberg estimate held that Qatar was, at one point, just four days from running dry. ## Finishing One War, Unready for the Next The Pentagon and White House have both closed ranks to insist they have more than enough to last out whatever Iran might throw at the region, and there is reason to believe them. Early-war concerns about the Gulf monarchies running completely dry were rendered largely moot once airstrikes brought down the rate of Iranian launches by an estimated 90 percent by the end of the first month. But finishing this war—whatever that means at this point—is entirely different from being ready for the next one. These stockpiles were not full to begin with. The US had already transferred more than 600 Patriot interceptors to Ukraine and other allied states since 2022, a drawdown that was quietly getting attention in Washington. It was last summer's 12-day war, codenamed Operation Rising Lion, that turned that attention into genuine alarm. To block Iranian missiles during that conflict, the US launched roughly 150 THAAD interceptors—about a quarter of Washington's entire supply—along with another 80 standard missile interceptors. By the time Epic Fury started eight months later, not a single one of them had been replaced. It was clear the US, and by extension most of its allies, was in tough shape on supplies. The question was how fast they could build more. ## The Production Math Does Not Add Up Here things go from concerning to terrifying. These interceptors are not thrown together on an assembly line in an afternoon. Each is a high-tech guided missile in its own right, with components that take over a year to manufacture from start to finish. The US domestically produces only about 50 Patriot interceptors a month. For context, US forces fired around 400 in the first 16 days of Epic Fury alone—consuming in less than a month what the production line puts out in roughly eight. THAAD is worse. According to CSIS's Wes Rumbaugh, no new THAAD interceptors had been delivered to US inventory since July 2023, a 30-month production gap that predates the war entirely. Even now, production sits under a hundred a year. At that rate, replacing just the interceptors expended in Epic Fury takes three years—assuming none get fired off in the meantime. Part of this comes down to budget priorities and political will. For most of the post-Cold War period, missile defense was built around a different threat model: a small number of high-end ballistic missiles in a brief, decisive exchange, with interceptors as a last resort. Some of these systems, like Patriot, date back to the 1970s, when the concern was stopping an all-out Soviet strike. The drone-and-missile barrage that now defines every Middle East conflict, and the skies over Ukraine, simply was not on anyone's radar. ## A Hollowed-Out Industrial Base Even once the political will is found, that only clears one barricade. You still have to find places and companies with both the setups and the sophistication to build these weapons—and the industrial base meant to do it has been hollowing out for decades. The propellant systems that make these missiles fly are now produced by just two American companies, down from six. Both share suppliers, and both depend on a single source for one of the key chemicals the propellant needs to ignite. Despite this, Washington has been trying to ramp up production since well before Epic Fury kicked off. The Pentagon signed multiple framework agreements earlier this year targeting three to four times current output across every major interceptor category, broke ground on a new munitions facility in Arkansas in January, and brokered a $500 million deal with Honeywell to surge component production. Even so, this is a massive uphill battle on end-of-decade timelines, not the next few months. With supplies this tight, the government has reportedly called in companies from GM to Ford to GE to discuss converting civilian manufacturing plants into at least partial missile-component production facilities. By all accounts, it was the first time Washington had asked automakers to consider retooling for munitions since the Second World War—a fact that probably tells you everything about how the people running this privately understand the hole they are in. ## Shopping Elsewhere If you are watching from outside the United States or the Middle East, you might think none of this is your problem. It very much is. Around two dozen countries run their primary missile defense on US-made interceptors. Outside of Japan, where Mitsubishi license-builds Patriots under a decades-old arrangement, every major US-aligned air defense architecture in the world depends on a supply chain that largely runs through Arkansas, Arizona, and Alabama. For those countries, there is no second source. During Epic Fury, that arrangement was stress-tested, and the results were not reassuring. As many as 48 THAAD interceptors were reportedly pulled from South Korea and moved to the Middle East in March. Seoul almost certainly fought the move, but as President Lee Jae Myung told a cabinet meeting on March 10: "While we have expressed opposition… the reality is that we cannot fully impose our position." That leaves countries like South Korea with an obvious question: if you cannot count on Washington to leave your interceptors where they are, who else can you buy from? There are some alternatives, but none with a track record you would want to bet your country's defense on. ## The Limits of Russian and Chinese Air Defense Iran built nearly its entire air defense architecture around Russia's S-300, which Moscow has exported to some 20 countries over the decades, including Venezuela. The results speak for themselves. Tehran later tried to develop its own domestic system, the Bavar-373, which has not fared much better—though Iran claimed it downed a US F-15 in early April. Russia's updated S-400 supposedly fixes all this. It has outperformed the S-300, but largely by clearing possibly the lowest threshold imaginable, and not by much. Deployed against Ukraine, Kyiv has destroyed multiple S-400 batteries and flown both drones and Storm Shadow cruise missiles through S-400 coverage zones, often without issue. India is the one outlier, having relied heavily on Russian hardware and claimed the system held up well against the Pakistani military last year. China's main export offering, the HQ-9, has a similar reputation. In that same confrontation between Pakistan and India, Beijing backed Pakistan—and it did not much matter, as Indian strikes reportedly penetrated Pakistani air defenses with relative ease. Neither record comes with a ringing endorsement, and that assumes buyers would want these systems in the first place. The political costs of siding with Moscow or Beijing are mounting. Turkey is a case study: a NATO member, it bought Russian S-400 systems, drew swift sanctions, and was expelled from the F-35 program in 2019. ## Europe Steps In, Slowly So if Russian and Chinese systems cannot do the job, what is actually available? Denmark answered in April by becoming the first export customer for a joint Franco-Italian system—a deal Danish defense officials explicitly framed around US delivery timelines being too long. The system enters service this year, and its manufacturer is targeting production above 300 interceptors a year by 2028, up from somewhere around 80 to 100 in 2024. Germany's IRIS-T family, which Ukraine has used to good effect, is scaling too. A new facility opened in January, but roughly three quarters of current production is going to Ukraine, which is itself delaying Germany's own buildup. So in a small number of cases there are alternatives—but they are either untested or have even lower interceptor production than American systems. That leaves the biggest question of all: how did the United States, of all countries, end up this unprepared? ## How the Rules Changed None of this used to be a crisis, even with low interceptor production. It simply was not assumed you would ever need vast numbers of them. During the 1991 Gulf War, Saddam Hussein fired roughly 88 Scud missiles at Israel and Saudi Arabia over six weeks, and that was considered an extraordinary provocation. The good old days. The reason was cost. Researching, designing, and producing large-scale ballistic missiles that could actually reach their targets was something only a handful of countries could manage as late as the 1990s. Today it is another world. A single Iranian Shahed drone now costs somewhere between $20,000 and $50,000 per unit. There are cheap alternatives for downing drones—just ask the Ukrainians—but not every country has invested in them. That is how the wild sight emerged of Bahrain and others using multimillion-dollar interceptors to shoot down drones assembled for a fraction of the cost. More relevantly, more nations now make at least halfway decent ballistic missiles in large numbers. The key factor is again cost. It is dramatically easier to shoot something in the general direction of your enemy and hope for the best than to track an incoming threat, analyze its precise path, calculate the trajectory to intercept it, and launch—all while course-correcting for variations mid-flight. Offense has become cheap; defense has stayed expensive. ## Ukraine Writes the New Playbook This was not quite the overnight shift it might seem. Ukraine has been at the forefront of this new kind of war for four years. Russia, a longtime ally of the Islamic Republic, has launched thousands of Shahed-type drones and its own cruise missiles at Ukrainian cities and infrastructure, and the interceptor math got ugly fast. It is simply not sustainable to shoot million-dollar interceptors at $20,000 drones, and neither the US nor Europe has been able to keep pace with the resupply numbers needed. Kyiv, depending on these defenses, got very good at its own version of counter-drone warfare. Ukraine's system uses 3D printers to mass-produce interceptor drones that chase down and ram the Shahed for between $1,000 and $2,000 apiece. By early 2026, Ukraine's armed forces were receiving more than 1,500 of them a day—and unlike the expensive, clunky Russian or Chinese interceptors, these boasted a success rate north of 70 percent. So when Epic Fury began and the Gulf faced running out of American ammunition, Kyiv was the capital they called. By the end of March, Zelensky was in Saudi Arabia signing ten-year defense cooperation agreements with both the Kingdom and Qatar, with the UAE expected to follow. It is a genuine breakthrough that Washington and the wider world should be watching more closely. But this new approach is limited to drone attacks. For all their ingenuity, the Ukrainians have not yet found a cheap, scalable way to stop ballistic missiles. On that front, we are right back to square one. ## The Allies Who Built Their Own—and Still Buckled On the interceptor side, there is some hope coming out of Japan. Mitsubishi has built Patriots under license for years, but postwar export restrictions meant it could not actually send them anywhere. That changed when Tokyo revised the rules in late 2023, and last year the first shipment arrived in the United States. It was only about ten missiles—a drop in the bucket—but if other allied nations with industrial capacity began producing their own interceptors under similar agreements, it might eventually lead somewhere. The one country that has shown real independence is Israel, which spent decades and billions building the only non-American, full-spectrum missile defense architecture that has held up reliably across multiple combat crises: Iron Dome at short range, David's Sling at medium range, and Arrow at the ultra-sophisticated end. Yet even that was buckling by mid-March under the Iranian onslaught. Some estimates had Arrow down around 80 percent, with the IDF pressing lower-tier systems into roles they were never designed for. It worked, sort of. Iranian penetration rates climbed as the war carried on, doing significant damage in a few strikes such as Dimona, but enough launchers were destroyed to end the acute phase before things got truly serious. Gambling on always being able to take out your opponent's launch infrastructure before they overwhelm your air defenses, however, is not a smart way to plan for conflict. For most of the last three decades, the countries under America's umbrella enjoyed the luxury of treating missile defense as a given—something that just works, where a missile getting through is the exception rather than the rule. That technology has been a blessing for much of the world and has saved countless lives. But if these interceptors run out before the production lines catch up, the reality of what war really looks like is going to come crashing back down. And right now, the stats remain daunting. ## Frequently Asked Questions ### How many interceptors did the US fire during the war with Iran? By the April 8th ceasefire, Washington had fired between 1,000 and 1,430 Patriot interceptors, roughly half its prewar stockpile. CSIS estimates 190 to 290 THAAD interceptors were launched from a prewar inventory of just 360, meaning up to roughly 80 percent are gone. SM-3 stocks fell more than 30 percent and SM-6 by another 10 to 20 percent on top of that. ### Why can't the US quickly rebuild its interceptor stockpiles? Each interceptor is a high-tech guided missile whose components take over a year to manufacture from start to finish. The US produces only about 50 Patriot interceptors a month — a rate the first sixteen days of Epic Fury alone outpaced eightfold. No new THAAD interceptors had been delivered since July 2023, a roughly 30-month production gap predating the war entirely, and the propellant industrial base has shrunk from six companies to two, both sharing suppliers and depending on a single source for a key ignition chemical. ### Why does the US interceptor shortage affect allied countries around the world? Around two dozen countries run their primary missile defense on US-made interceptors. Outside Japan, which license-builds Patriots under a decades-old arrangement, every major US-aligned air defense architecture depends on a supply chain running largely through Arkansas, Arizona, and Alabama. There is no second source, and when Washington comes up short it pulls interceptors from allied inventories — as when as many as 48 THAAD interceptors were reportedly moved from South Korea to the Middle East in March, leaving Seoul unable to fully resist the transfer. ### How has Ukraine changed the economics of drone defense? Ukraine mass-produces 3D-printed interceptor drones that chase down and ram incoming Shaheds for $1,000 to $2,000 apiece. By early 2026, Ukraine's armed forces were receiving more than 1,500 of them a day with a success rate above 70 percent, fundamentally altering the cost equation for drone defense. The approach is limited to drones, however — no one, including Kyiv, has yet found a cheap, scalable way to stop ballistic missiles. ### Did Israel's independent missile defense architecture hold up against Iran? Israel built the only non-American full-spectrum architecture — Iron Dome at short range, David's Sling at medium range, and Arrow at the high end — but even it was buckling by mid-March under the Iranian onslaught. Some estimates had Arrow down around 80 percent, with the IDF pressing lower-tier systems into roles they were never designed for. 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