US munition stocks shrink as Iran conflict lingers, replenishment years away

U.S. stockpiles of high-end air-defense interceptors—Patriot missiles and THAAD—are severely depleted, with CSIS and sources inside the Pentagon estimating far fewer than pre-war levels (fewer than about 827 Patriot interceptors and 278 THAAD missiles remain). With no lasting settlement with Iran in sight, dwindling munitions could constrain U.S. defense options on other fronts, prompting riskier interceptions or delayed responses. The Defense Department has moved to boost production, but lead times mean a full replenish could take years, fueling bipartisan calls in Congress for more funding and accountability. While Trump has claimed inventories are in good shape, analysts warn the shortage reflects a systemic challenge tied to the ongoing conflict and broader security commitments.