Operation Epic Fury Drains Indo-Pacific Deterrence: The Growing Air and Missile Defense Crisis

The United States finds itself in an increasingly precarious strategic position as Operation Epic Fury, the ongoing military campaign against Iran that commenced on February 28, 2026, continues to siphon critical military assets away from the Indo-Pacific theater. What began as a decisive joint US-Israeli strike operation has evolved into a sustained commitment that is exposing deep vulnerabilities in America's ability to maintain credible deterrence against China, the challenge that successive administrations have identified as the most consequential facing the United States.

The scale of the diversion is striking. According to the Atlantic Council's tracker updated on April 10, 2026, two of the Navy's four available aircraft carriers — the USS Abraham Lincoln and the USS Gerald R. Ford — are currently committed to Operation Epic Fury, with a third carrier, the USS George H.W. Bush, having deployed to join them. The USS Nimitz, originally slated for decommissioning in May 2026, received an emergency service life extension to March 2027, a decision that reflects the acute strain on carrier availability. The USS Tripoli, an amphibious assault ship homeported in Japan and normally a critical Indo-Pacific presence asset, is now operating in the Arabian Sea. The USS Boxer has deployed from San Diego to the Middle East. In practical terms, the Indo-Pacific Command is operating with a significantly diminished naval presence at a time when Chinese naval activity continues to intensify.

The interceptor depletion problem is equally alarming, and arguably more consequential for a potential Taiwan contingency. During last summer's 12-day conflict between Iran, Israel, and the United States, American forces expended between 100 and 150 upper-tier, terminal-phase missile interceptors — including THAAD and Patriot Advanced Capability-3 missiles — in defense of Israeli airspace. This represented approximately 25 percent of the total US stockpile, or 150 percent of annual global production at current manufacturing rates. Operation Epic Fury, now in its seventh week with no clear end date, has likely drawn down those stockpiles further. Lockheed Martin has announced expanded THAAD interceptor production in partnership with the Department of Defense, but production lead times mean that replacement interceptors will not reach operational units for months or years.

In the Indo-Pacific context, this interceptor shortfall is potentially catastrophic. Modeling by the Stimson Center has produced a sobering assessment: the United States would likely exhaust its entire inventory of Patriot and upper-tier terminal-phase interceptors within the first 24 hours of a military conflict with China. China's PLA Rocket Force possesses the largest and most diverse arsenal of conventional ballistic missiles in the world, with estimated inventories exceeding 2,000 DF-21 and DF-26 medium-range ballistic missiles alone, alongside thousands of shorter-range systems. Beijing's defense industrial base can produce these weapons at a fraction of the cost of the interceptors designed to defeat them, creating fundamentally unfavorable cost-exchange ratios that no single nation can sustain indefinitely.

Recognizing these realities, a growing body of analysis from institutions including the United States Studies Centre and the Center for a New American Security has argued that coalition-based air and missile defense represents the most viable near-term path to closing the gap. A tabletop exercise conducted in Hawaii in June 2025, convened by the United States Studies Centre with participants from Japan, Australia, South Korea, Taiwan, and the United States, demonstrated both the potential and the profound challenges of such an approach. The exercise required teams to design integrated air and missile defense architectures that were not only militarily effective but also politically feasible — meaning recommendations had to have a "better than even" chance of actual implementation by all five partners under current conditions.

The political constraints are formidable. The extreme geographic distances separating potential coalition partners — from Japan to Australia spans roughly 6,000 kilometers — make sensor integration and weapons coordination technically demanding. More critically, the region's security architecture remains built on a US hub-and-spokes model with limited multilateral defense institutionalization. Historical tensions between Japan and South Korea, while improved in recent years, continue to complicate intelligence sharing and operational coordination. Taiwan's unique diplomatic status creates additional legal and political barriers to formal defense integration. And diverging risk tolerances among coalition partners regarding provocation of China mean that not all states are willing to host forward-deployed sensors or interceptor batteries that could make them targets in a conflict.

Against this backdrop, North Korea's missile launches on April 7-8, 2026, which prompted a formal statement from USINDOPACOM noting close consultation with allies and partners, serve as a reminder that threats in the Indo-Pacific are not hypothetical. The 28,000 US troops stationed in South Korea, the rotational presence in the Philippines, and the forward-deployed forces in Japan all depend on air and missile defense capabilities that are being stretched thin by competing demands.

Former Deputy Secretary of State Kurt Campbell has publicly expressed concern that the military capabilities the United States had patiently accumulated in the Indo-Pacific might not return in full even after the Iran war concludes. This assessment reflects a hard strategic reality: ships, aircraft, and missile interceptors deployed to the Middle East accumulate wear and tear that requires maintenance availabilities, munitions expended are not quickly replaced, and the institutional focus of the Pentagon's planning and logistics apparatus has shifted decisively toward sustaining Operation Epic Fury.

The FY2026 National Defense Authorization Act, which proposes $878.7 billion for the Department of Defense out of a total $925 billion authorization, provides substantial resources but cannot instantaneously generate the industrial capacity needed to replenish expended munitions or accelerate ship maintenance. The defense industrial base, already overstretched before the Iran conflict, faces the dual challenge of sustaining current operations while rebuilding stockpiles that serve as the foundation of deterrence in the Pacific.

What emerges from this convergence of factors is a window of strategic vulnerability that Beijing is well positioned to observe and potentially exploit. The United States and its Indo-Pacific partners face difficult choices about how to allocate scarce air and missile defense assets, whether to invest in new coalitions that can generate operational efficiencies through burden sharing, and how to signal resolve while managing the reality of diminished forward presence. The answers to these questions will shape the security environment in the world's most consequential strategic theater for years to come.