Part 1: The U.S. Munitions Problem

Key Takeaways

• Seven critical missile types depleted during 39‑day Iran campaign.
• Stockpiles were already insufficient for near‑peer war before the conflict.
• Depletion weakens U.S. preparedness for future Pacific contingencies.
• Non‑critical munitions like JDAM and AMRAAM remain at functional levels.
• Rebuilding critical inventories will require years and significant budget allocations.

Pulse Analysis

The 39‑day air campaign against Iran, launched in early 2026, consumed a surprising amount of the United States’ high‑end missile stockpiles. A CSIS analysis released in late April, corroborated by the New York Times and the Wall Street Journal, identifies seven weapon systems—Tomahawk, JASSM, PrSM, SM‑3, SM‑6, THAAD and PAC‑3 MSE—as “critical” because they take years to replace and are central to any future Indo‑Pacific conflict. Even before the Iran war, Pentagon assessments warned these inventories fell short of near‑peer war requirements. The campaign therefore turned a pre‑existing shortfall into a pronounced capability gap.

The erosion of those critical munitions reverberates beyond the Middle East. U.S. planners rely on a robust long‑range precision fire suite to counter a potential Chinese challenge over Taiwan. With Tomahawks, JASSMs and PrSMs depleted, the ability to strike high‑value targets from sea or land is compromised, while loss of SM‑3, SM‑6, THAAD and PAC‑3 MSE reduces layered missile‑defense against ballistic and cruise threats. Reconstituting these stocks will demand sustained production, constrained by limited industrial capacity and competing foreign‑military‑sales commitments, notably to Ukraine.

Policymakers now face a choice: accelerate domestic missile manufacturing, diversify the supply chain, or accept a temporary dip in deterrence. The Defense Department could invoke the Defense Production Act to prioritize critical components, while Congress may need to approve $10‑15 billion over five years to close the gap. Sharing excess munitions like JDAMs and AMRAAMs with allies can provide short‑term relief. The Iran war thus exposes how a limited regional conflict can reveal systemic vulnerabilities in the U.S. munitions ecosystem.