Years of American military engagements around the world have exposed troubling weaknesses in the country’s defense readiness. The war with Iran, in particular, has revealed the consequences of Washington’s longstanding neglect of military logistics, naval readiness, force rotations, and air defense capabilities.

These structural weaknesses have produced years-long maintenance backlogs, undermined preparations for large-scale conflicts, and delayed weapons deliveries to both American forces and U.S. allies. The lessons emerging from major conflicts in Europe and the Middle East point toward two urgent priorities for the fiscal year 2027 defense budget: rebuilding missile defense stockpiles and reversing decades of stagnation in naval production.

The war against Iran has exposed an array of operational shortcomings that have allowed Tehran and its proxies to wage an effective asymmetric campaign. Already burdened by inadequate shipbuilding capacity and delayed modernization, the U.S. Navy has found itself increasingly overstretched, with the conflict aggravating longstanding readiness problems.

Aircraft carriers such as the USS Gerald R. Ford, USS Dwight D. Eisenhower, and USS Abraham Lincoln have undertaken unusually lengthy deployments, placing additional strain on crews, vessels, and maintenance schedules. These extended operations are contributing to a growing backlog of repairs that threatens the Navy’s ability to sustain future deployments.

The logistical consequences have been equally revealing. Washington underestimated Iran’s willingness to strike American military facilities in neighboring Gulf states, disrupting critical supply networks. Following extensive damage to Naval Support Activity Bahrain, the headquarters of the U.S. Fifth Fleet, American naval operations became increasingly dependent on the joint U.S.-British facility at Diego Garcia. Its location deep in the Indian Ocean has made resupply considerably slower and more complicated.

The USS Abraham Lincoln attracted international attention amid reports of deteriorating crew morale and shortages of essential supplies. Such difficulties illustrate how the loss of a single logistical hub can undermine the operational tempo of an entire military campaign.

The implications extend well beyond the Middle East. China and North Korea possess missile capabilities that could threaten American military facilities across Japan, South Korea, the Philippines, and Guam. A prolonged conflict in the Indo-Pacific could therefore expose U.S. forces to logistical disruptions far more severe than those experienced against Iran.

During the summer of 2026, the U.S. Navy was left without a carrier strike group in the Indo-Pacific for the first time in decades. The absence resulted largely from the demands of the Iran war and a months-long naval blockade that, at its height, involved three American aircraft carriers.

Yet these operational gaps reflect a deeper problem. Repeated military engagements in the Caribbean and Middle East have pushed American carrier strike groups into increasingly demanding deployment cycles, leaving ships and crews with insufficient time for maintenance, training, and recovery.

Compounding this exhaustion is the erosion of America’s shipbuilding capacity. Decades of declining industrial investment have left the United States confronting shortages of shipyards, skilled workers, and maintenance facilities. Production delays affecting new warships, submarines, and other vessels make it increasingly difficult to replace aging platforms or sustain a naval presence across multiple theaters simultaneously.

Missile defense presents an equally urgent challenge. Successive confrontations with Iran since 2024 have placed extraordinary demands on American interceptor inventories, with the direct war in 2026 accelerating their depletion.

Before the conflict, U.S. inventories were estimated to include approximately 2,330 Patriot interceptors and 452 Terminal High Altitude Area Defense (THAAD) interceptors. Assessments by the Center for Strategic and International Studies indicate that the war has consumed a substantial share of these stockpiles, with Patriot expenditures reaching roughly two-thirds of the prewar inventory by November 2026.

Such losses carry consequences far beyond the immediate conflict. Replenishing sophisticated interceptors takes time, and manufacturers cannot rapidly replace weapons consumed during sustained military operations. Every missile expended in the Middle East potentially reduces the resources available for contingencies elsewhere.

Washington has consequently faced increasingly difficult decisions over how to allocate scarce air defense systems between its own forces and foreign partners. Delays and shifting delivery priorities risk undermining military assistance to Ukraine, complicating commitments to Asian allies, and weakening confidence in America’s reliability as a defense supplier.

For governments seeking dependable protection against ballistic missiles, uncertain delivery schedules may encourage the pursuit of alternative suppliers or defense partnerships. That possibility is particularly consequential for countries balancing security relationships with Washington against growing economic and diplomatic ties with Beijing.

The stakes are especially high in the Indo-Pacific, where American forces confront the sophisticated missile arsenals of China and North Korea. China’s People’s Liberation Army Rocket Force possesses an expanding range of advanced ballistic and hypersonic weapons designed to challenge American bases, warships, and regional defenses. North Korea, meanwhile, maintains substantial missile capabilities capable of threatening South Korea and other regional targets.

Addressing these vulnerabilities requires more than simply increasing the Pentagon’s budget. Revitalizing American shipbuilding will demand sustained investment in workforce recruitment, expanded shipyard capacity, more efficient procurement practices, and rigorous oversight of naval programs that repeatedly fall behind schedule.

Legislative initiatives such as the SHIPS for America Act offer opportunities to strengthen domestic commercial shipbuilding and rebuild the maritime industrial workforce. International shipbuilding cooperation could also help relieve production bottlenecks, particularly through partnerships with established maritime powers such as South Korea, Japan, and Finland.

On missile defense, the Trump administration has begun expanding production, acknowledging an inventory problem that successive administrations, including its own, have underestimated. The scale of the challenge, however, remains considerable.

Raytheon has secured major contracts to increase production of SM-6 and AMRAAM missiles, while Lockheed Martin is expanding manufacturing capacity for PAC-3 interceptors used by Patriot air defense systems. Yet higher production targets alone will not resolve the underlying vulnerabilities in America’s defense supply chains.

China’s dominance of rare-earth processing and other critical mineral supply chains represents a particularly serious concern. Expanding domestic manufacturing without securing reliable access to essential materials risks replacing one industrial bottleneck with another.

Closer cooperation with Australia, India, Japan, Indonesia, and other partners could help diversify these supply chains and reduce dependence on Chinese-controlled processing capacity. Such partnerships should become an integral component of American defense-industrial planning rather than an afterthought.

The war with Iran has exposed weaknesses in American conventional military readiness that demand sustained attention from Congress, the Pentagon, and the White House. Naval overstretch, vulnerable logistical networks, and depleted missile defenses are not isolated problems. Together, they threaten Washington’s ability to sustain a high-intensity conflict against a more capable adversary.

The United States still has an opportunity to address these vulnerabilities before facing a potential confrontation with a near-peer competitor such as China. But that opportunity should not be mistaken for a guarantee that time is on Washington’s side.

Serious investment in naval production, interceptor manufacturing, supply-chain resilience, and realistic military exercises must now take precedence over assumptions about American military superiority. The lesson of the Iran war is not that the United States lacks formidable military power. It is that even formidable military power can become dangerously brittle when its industrial and logistical foundations are allowed to deteriorate.