(DEFENCE SECURITY ASIA) — The United States has reportedly expended virtually all available Army Tactical Missile Systems and Precision Strike Missiles during its five-month campaign against Iran, transforming a Middle Eastern war into an urgent test of American global deterrence.

The reported depletion affects weapons specifically designed to destroy time-sensitive, defended targets from stand-off distances, making the drawdown operationally significant for future contingencies involving China, Russia, North Korea, or another heavily armed regional adversary.

ATACMS and PrSM launches from American positions in Kuwait and Bahrain allowed U.S. forces to strike targets across southern Iran while limiting aircraft exposure to Iranian surface-to-air missiles, fighter interception, electronic warfare, and contested airspace.

That protection carried an accumulating logistical cost because every missile fired removed a scarce, expensive munition from inventories supporting other combatant commands, creating a direct trade-off between immediate force protection and longer-term worldwide readiness.

Three individuals familiar with internal figures confirmed extensive expenditure, while two characterised the remaining ATACMS and PrSM supply as virtually exhausted, although exact quantities, operational reserves, deployed rounds, and emergency allocations remain undisclosed.

A fourth individual indicated that U.S. Central Command nearly consumed its pre-war regional holdings before drawing replacement missiles from stocks positioned elsewhere, demonstrating how sustained combat can convert theatre shortages into worldwide force-management problems.

The Pentagon has not published inventory figures permitting independent verification, meaning reported exhaustion should be distinguished from absolute national depletion because classified war reserves, training allocations, forward-positioned weapons, and contractor-held rounds may remain available.

Nevertheless, transferring missiles between combatant commands changes military risk even when aggregate stocks are not completely empty, because geographically displaced weapons require transportation, security, launcher integration, maintenance support, and political approval before becoming operationally useful.

The Iran campaign therefore exposes magazine depth as a strategic variable rather than an accounting issue, since a military can retain technologically superior launchers while losing credible combat endurance when compatible precision-guided munitions become scarce.

President Donald Trump declared that America possesses “far more munitions than anyone in the world” and “far more than we need,” emphasising expanding factories and record production while rejecting suggestions that the military lacks necessary firepower.

Pentagon chief spokesperson Sean Parnell similarly maintained that American forces possess everything required to execute operations wherever directed, but those assurances address aggregate capability rather than publicly resolving questions concerning particular missile inventories and replenishment timelines.

The central strategic question is consequently not whether the United States remains militarily powerful, but whether its shrinking inventories can simultaneously sustain pressure against Iran, reassure exposed allies, defend forward bases, and deter opportunistic escalation elsewhere.

Stand-Off Warfare’s Hidden Cost

American reliance on ATACMS and PrSM reflected a calculated force-protection decision because ground-launched weapons could attack Iranian command sites, missile infrastructure, air-defence positions, and other fixed targets without repeatedly sending crewed aircraft through defended approaches.

ATACMS offers a reported maximum range near 300 kilometres, while the newer PrSM Increment One reaches approximately 500 kilometres or more, extending the engagement envelope available to HIMARS and Multiple Launch Rocket System batteries deployed around Iran.

PrSM also places two missiles within each compatible launcher pod, increasing ready-fire capacity over ATACMS, but its recent introduction around 2023 meant pre-war inventories remained limited when Operation Epic Fury created the system’s first reported combat demand.

Each missile costs more than US$1 million, equivalent to at least RM4 million, yet financial value alone understates its battlefield importance because specialised motors, seekers, guidance components, explosives, electronics, and qualified production lines cannot be replaced immediately.

Their precision enabled commanders to prosecute targets from Gulf bases while reducing dependence upon suppression of enemy air defences, aerial refuelling, combat-search-and-rescue coverage, escort fighters, electronic-attack aircraft, and vulnerable airborne intelligence platforms.

However, stand-off warfare exchanges aircraft risk for ammunition consumption, meaning prolonged operations can eventually force commanders toward shorter-range weapons, more complex air packages, smaller target sets, or operational pauses once premium missiles approach minimum reserve thresholds.

One individual directly connected the exceptional expenditure to an administration preference for avoiding riskier crewed bombing missions, indicating that future large-scale attacks could demand greater aircraft exposure if land-based precision-strike magazines cannot be rapidly restored.

That shift would increase mission-planning complexity because Iranian air defences, dispersal practices, hardened facilities, decoys, electronic countermeasures, and mobile missile units could require repeated sorties and supporting assets to achieve effects previously delivered from remote launch positions.

The campaign consequently demonstrates that stand-off range is inseparable from logistical endurance, since the operational value of HIMARS or MLRS batteries declines sharply when missile availability, transportation capacity, maintenance personnel, and secure storage cannot sustain firing rates.

Iran may therefore have imposed strategic costs without defeating American forces tactically, because surviving a prolonged precision-strike campaign compelled Washington to consume weapons also considered essential for high-intensity operations across the Indo-Pacific and European theatres.

Global Magazines Under Pressure

The Army missile drawdown forms only one component of a broader expenditure pattern reportedly affecting Tomahawk cruise missiles, Patriot air-defence interceptors, and Terminal High Altitude Area Defense weapons during offensive strikes and protection against Iranian retaliation.

Slightly less than half the global Tomahawk inventory was reportedly expended after hostilities began, although that estimate remains independently unverified, potentially constraining submarine and surface-warship strike capacity across geographically separated commands.

Patriot interceptor stocks were estimated to have fallen approximately 65 percent between February and July, with two individuals indicating that this assessment corresponded with internal figures, while exact variants and remaining serviceable rounds were not disclosed.

THAAD inventories were estimated to be at least 38 percent below their pre-war level, further highlighting how defending bases, population centres, logistics hubs, airfields, ports, and command facilities can consume strategic interceptors faster than industry replaces them.

Unlike offensive missiles, Patriot and THAAD weapons represent defensive magazine depth, meaning depletion can directly reduce commanders’ confidence in protecting concentrations of aircraft, fuel, personnel, communications equipment, ammunition, and reinforcement infrastructure from ballistic-missile attack.

The combined expenditure reveals an unfavourable cost-exchange dynamic because adversaries can launch comparatively cheaper missiles or drones to trigger expensive interceptors, while simultaneous offensive requirements consume separate stocks of sophisticated long-range precision weapons.

CENTCOM’s reported reliance on globally redistributed missiles demonstrates that regional inventory labels can conceal strategic displacement, since reinforcing the Middle East may leave fewer immediately available weapons for Pacific, European, homeland, or contingency response plans.

Redistribution also creates a logistics footprint extending beyond aircraft and ships, encompassing certified handling teams, secure depots, environmental controls, specialised transport, launcher software, mission-planning data, communications architecture, and intelligence required for effective targeting.

Military leaders had reportedly warned for weeks that defensive inventories were declining, placing ammunition sustainability inside high-level deliberations over whether another major attack on Iran could proceed without reducing American options elsewhere.

Consequently, the operational constraint may emerge before inventories reach zero, because planners must preserve minimum reserves for base defence, escalation control, unexpected attacks, training, testing, allied commitments, and presidential response options across several theatres.

China and the Indo-Pacific Risk

PrSM, ATACMS, and Tomahawk missiles are particularly important for an Indo-Pacific confrontation because vast distances, limited basing access, Chinese anti-access capabilities, and threatened runways require dispersed forces capable of delivering precision effects from survivable positions.

China possesses extensive missile forces designed to threaten American and allied bases, ports, command nodes, airfields, carriers, logistics routes, and reinforcement infrastructure, placing extraordinary demands upon both offensive counterstrike weapons and defensive interceptor inventories.

War-game assessments had already questioned whether pre-conflict American precision-munition holdings could sustain a major peer confrontation, meaning expenditure against Iran may deepen a pre-existing capacity gap rather than create an entirely new vulnerability.

The strategic concern centres upon a temporary window during which Beijing could calculate that Washington possesses fewer immediately available weapons, although inventory uncertainty, nuclear deterrence, allied forces, submarines, bombers, and other capabilities complicate any such assessment.

Reduced PrSM availability would particularly affect emerging distributed Army concepts intended to hold ships, air-defence systems, missile launchers, and command facilities at risk from mobile land positions distributed throughout allied or partner territory.

Lower Tomahawk stocks could simultaneously limit naval strike endurance, while reduced Patriot and THAAD inventories would complicate protection of Guam, Japan, deployed forces, logistics hubs, and other nodes exposed to sustained Chinese ballistic-missile operations.

Reported delays affecting allied deliveries, including Japan’s Tomahawk acquisition, could amplify this posture problem if replenishing American stocks competes with strengthening partners expected to distribute targeting, basing, and long-range strike responsibilities during a regional crisis.

The resulting vulnerability is logistical and geopolitical because allies judge American commitments partly through visible force posture, reinforcement capacity, deployable magazines, industrial output, and the credibility of promises to sustain combat after initial exchanges.

No evidence establishes that the drawdown makes American intervention impossible, but it could narrow the range, duration, and sequencing of available operations while increasing reliance on aircraft, shorter-range systems, allied inventories, or lower-cost weapons.

For Indo-Pacific planners, Iran therefore becomes a warning that technologically advanced missiles cannot provide enduring deterrence without production depth, protected stockpiles, distributed logistics, resilient bases, interoperable launchers, and sufficient quantities for prolonged combat.

Russia, Ukraine and Concurrent Wars

European security faces related pressure because ATACMS has previously been supplied to Ukraine, while Patriot interceptors remain critical for defending Ukrainian infrastructure, cities, forces, and energy networks against Russian ballistic and cruise-missile attacks.

Shrinking American stocks could constrain additional transfers even when political support exists, because every exported missile competes with operational plans, war reserves, training requirements, forward deployments, and potential demands from allies facing separate regional threats.

PrSM is replacing ATACMS rather than merely supplementing it, creating a transitional risk in which production of the older weapon has largely ended before sufficient quantities of its more capable successor have accumulated across American formations.

This production transition matters because restarting an ageing missile line could require suppliers, tooling, workforce skills, testing capacity, and obsolete components, while accelerating PrSM involves its own certification, subcontractor, material, and quality-control constraints.

Russia could exploit constrained Western magazines indirectly by sustaining pressure on Ukraine, forcing NATO governments to choose between immediate battlefield requirements and rebuilding national inventories necessary for collective defence against a wider confrontation.

The reported drawdown does not prove that Washington will terminate support for Kyiv, but it raises the opportunity cost of transferring scarce precision weapons and interceptors while American commanders are replenishing Middle Eastern deployments.

Simultaneous crises create compounding rather than additive demand because missiles must be positioned before combat, launchers require trained crews, interceptors protect reinforcement routes, and production allocated to one user remains unavailable to others for years.

Moscow and Beijing may also examine Iran’s ability to absorb expensive strikes, disperse systems, threaten shipping, and impose interceptor consumption, extracting operational lessons about exhausting Western magazines without seeking symmetrical technological performance.

Conversely, the campaign provided American forces with combat data concerning PrSM employment, long-range targeting, joint command relationships, launcher deployment, battle-damage assessment, and Iranian countermeasures that could improve doctrine for future contested environments.

The European implication is therefore balanced: the United States gained operational experience and degraded Iranian capabilities, yet it apparently did so by consuming weapons whose scarcity could restrict support, reinforcement, and escalation-management choices elsewhere.

Rebuilding the Arsenal

The Army has requested nearly US$2 billion, equivalent to approximately RM8 billion, for about 1,134 PrSM rounds in fiscal year 2027, representing a substantial funding expansion but not immediate delivery of operationally deployable missiles.

Lockheed Martin has developed frameworks for increasing PrSM output, with prospective annual capacity previously discussed around 300 to 400 weapons, although multi-year procurement, supplier expansion, testing, and delivery schedules limit the speed of replenishment.

Even accelerated production may require several years to restore inventories because procurement funding must move through contracts, component orders, motor fabrication, electronics assembly, acceptance testing, transportation, storage preparation, and distribution among competing commands.

Raytheon has reached a tentative multi-year arrangement with the Pentagon to expand Tomahawk production, while broader manufacturing efforts cover Patriot and other munitions, but corporate capacity announcements cannot substitute for delivered, inspected, serviceable rounds.

Manufacturers face structural constraints involving specialist labour, energetics, rocket motors, microelectronics, guidance components, casting capacity, subcontractor fragility, long-lead materials, and government demand signals that historically fluctuated between conflicts and peacetime reductions.

Earlier assessments suggested some critical inventories might require three to five years or longer to recover, potentially extending vulnerability into 2029–2031 depending upon expenditure rates, contract execution, industrial expansion, and future operational demands.

Official assurances regarding record production can coexist with weapon-specific shortages because aggregate munitions output includes numerous categories, while military readiness depends upon having the correct variant, quantity, location, launcher compatibility, and target data.

Washington’s emerging adaptation may therefore require balancing exquisite missiles with lower-cost weapons, attritable systems, expanded magazines, hardened depots, dispersed basing, diversified suppliers, and production lines designed for sustained wartime replacement rather than episodic procurement.

The Strait of Hormuz adds economic urgency because disruption to a waterway carrying roughly 20 percent of global oil and liquefied natural gas can transmit military ammunition shortages into energy prices, inflation, diplomacy, and domestic politics.

Ultimately, the reported ATACMS and PrSM depletion reveals that American deterrence depends not only upon superior platforms and precision technology, but upon whether its industrial base and logistics network can regenerate combat power faster than simultaneous adversaries consume it.