Recent reports from organizations including the Wall Street Journal, CNN, and News18, citing senior US officials, indicate potential shortfalls in the United States' inventory of critical military missiles. These reports suggest that key missile stocks, such as Tomahawk land-attack missiles, SM-3 interceptors, and Patriot missiles, could face rapid depletion under certain operational conditions.

A contributing factor to these concerns is the substantial use of Patriot missiles by Ukraine during its protracted conflict with Russia. Although the exact "magazine depth" of US air-defense interceptors remains classified, there are calls for the timely replenishment of Patriot and Standard Missile interceptor stockpiles. The reports also highlight a broader regional challenge, noting that Israel is experiencing its own concerns regarding arms supply, particularly with Arrow 3 air-defense interceptors.

Additionally, the financial aspect of military engagement is addressed, with initial strike operations reportedly costing hundreds of millions of dollars.

Source: https://www.livemint.com/news/world/how-long-can-the-us-sustain-the-iran-war-pentagon-warns-of-looming-missile-shortage-11772611210254.html