Pentagon Warns: US Could Run Out of Key Missiles in Iran Strike

The leaked Pentagon documents from last week painted a stark picture: if US strikes on Iran continue beyond 10 days, America's stockpiles of critical missiles could start running dangerously low.

The timing couldn't be more ironic. When the US and Israel launched their Saturday strikes against Iran, Washington and Tehran were actually engaged in ongoing talks about Iran's nuclear program, ballistic missile limitations, and ending Tehran's support for regional armed groups. Iran's swift retaliation—hitting US military assets across Bahrain, Saudi Arabia, Qatar, the UAE, and Iraq—turned those diplomatic discussions into a military reality check.

Trump's Confidence vs. Pentagon's Warnings

Donald Trump struck a defiant tone Tuesday on Truth Social, claiming US munitions stockpiles "have never been higher or better" with "virtually unlimited supply." He insisted wars could be fought "forever" using current supplies.

But behind closed doors, the Pentagon was singing a different tune. The Wall Street Journal reported that Pentagon officials and Joint Chiefs Chairman Dan Caine had warned Trump about the dangers of a prolonged Iranian campaign. The Washington Post added that Caine specifically cautioned about critical munitions shortages and lack of regional allied support hampering efforts to contain Iranian retaliation.

Trump's public dismissal of these warnings—claiming Caine "believed" in a war with Iran—only highlighted the disconnect between presidential optimism and military reality.

The Mathematics of Modern Warfare

The numbers tell a sobering story. During last year's 12-day Israel-Iran conflict, the US fired over 150 THAAD interceptor missiles—roughly 25% of its entire THAAD inventory. Each THAAD battery costs between $1-1.8 billion, and manufacturing replacements takes months of assembly, integration, and testing.

Marco Rubio laid out the production mismatch Monday: Iran churns out over 100 missiles monthly while the US and allies manage just 6-7 interceptors in the same timeframe. "They can build 100 of these a month, not to mention thousands of one-way attack drones," Rubio noted. "They've been doing this for a very long time. And by the way, they've been doing it under sanctions."

The asymmetric economics are brutal—using million-dollar interceptors to stop thousand-dollar missiles creates an unsustainable cost spiral.

The Depletion Reality

US Central Command has deployed over 20 weapons systems in the current Iran operation, from B-2 stealth bombers to Patriot defense batteries. But it's the high-end interceptors that pose the biggest concern.

Standard Missile-3 (SM-3) stocks are already running thin from previous Yemen strikes and earlier Iranian clashes. The situation worsened Sunday when at least three US jets were shot down in Kuwait in what officials called a "friendly fire incident"—not just depleting weapons but losing them to operational mistakes.

Christopher Preble from the Stimson Center warned that current interception rates "could not continue indefinitely, certainly, and perhaps could not continue for more than several weeks."

The Global Stockpile Shuffle

Running low on interceptors forces uncomfortable strategic choices. Some missiles earmarked for Ukraine's defense against Russian strikes might need rerouting to the Middle East. Others stationed in the Indo-Pacific—crucial for any potential China contingency—could face similar pressure.

"There would be some concern with removing those weapons from that theater," Preble noted, highlighting how regional conflicts can create global vulnerabilities.

The financial toll is already mounting. Reports suggest the US spent $779 million in the first 24 hours of Iran operations, plus $630 million for pre-strike preparations. Operating a carrier strike group like the USS Gerald R. Ford costs approximately $6.5 million daily.