U.S. Military Reallocates JASSM-ER Missiles Amid Iran Conflict

The United States is reallocating its long-range Joint Air-to-Surface Stand-Off Missiles – Extended Range (JASSM-ER) from the Pacific to support its military operations in Iran. This decision, made in late March 2026, involves moving nearly the entire inventory of JASSM-ER missiles to U.S. Central Command (CENTCOM) bases in the Middle East and the Fairford base in the United Kingdom. As a result, only approximately 425 JASSM-ER missiles will remain available globally, down from a pre-war stockpile of nearly 2,300. This shift raises concerns about the U.S. military's readiness to respond to threats in the Indo-Pacific region, particularly from China.

South China Morning PostBoston HeraldAsia Times

The JASSM-ER, developed by Lockheed Martin, is a crucial asset in the U.S. military's arsenal, capable of striking targets over 965 kilometers while evading air defenses. Analysts indicate that the commitment of about two-thirds of the JASSM inventory to the Iran conflict could severely limit the U.S. military's operational capacity against high-end adversaries like China. The rapid consumption of these missiles—over 1,000 JASSM-ERs were reportedly used within the first month of the Iran war—highlights a significant strain on U.S. munitions stocks.

Asia TimesBoston HeraldSouth China Morning Post

Critics argue that the U.S. military's reliance on high-end munitions like the JASSM-ER is unsustainable. General Dan Caine, Chairman of the Joint Chiefs of Staff, noted in a March 2026 briefing that the U.S. might need to resort to less sophisticated munitions, such as Joint Direct Attack Munitions (JDAM) and AGM-114 Hellfire missiles, which have significantly shorter ranges. This shift could compromise the effectiveness of U.S. operations in both Iran and potential future conflicts.

Asia Times

Despite U.S. claims of having neutralized a substantial portion of Iran's air defense systems, reports indicate that Iran has maintained significant capabilities, particularly those hidden underground. The New York Times cited intelligence suggesting that Iran's air defenses remain a credible threat, evidenced by recent shoot-downs of U.S. aircraft, including an F-15E and an A-10. This discrepancy raises questions about the effectiveness of U.S. operations and the potential risks involved in the ongoing conflict.

Asia Times

The current trajectory of U.S. military operations in Iran, coupled with the depletion of JASSM-ER stocks, poses a strategic dilemma for the U.S. as it seeks to maintain deterrence in the Indo-Pacific. Analysts warn that if the U.S. continues to expend munitions at the current rate, it could face significant challenges in responding to a potential conflict with China, particularly regarding Taiwan. The implications of this military strategy could reshape U.S. defense posture in the coming years.

Asia Times

• “That operational demand is now driving a rapid and potentially unsustainable rate of munition expenditure.” — Macdonald Amoah, Foreign Policy Research Institute

Asia Times

• “Hacker notes the defense industry is optimized for efficiency, not scale, with complex, high-end designs increasing production time and cost.” — Tyler Hacker, Center for Strategic and Budgetary Assessment

Asia Times

This strategic shift underscores the complexities and challenges facing U.S. military operations as it navigates multiple theaters of conflict while attempting to maintain global deterrence.

Asia Times