US needs at least three years to rebuild missile stocks depleted in Iran war

A report by Washington think tank CSIS says US defence manufacturers need at least three years to replenish stockpiles of three key missile systems heavily used during the war against Iran. The findings expose significant production bottlenecks in the American defence industrial base. The conclusions have broad implications for NATO allies, including Estonia.

A new analysis by the Washington-based Center for Strategic and International Studies (CSIS) has found that US defence manufacturers will need at least three years to replenish stockpiles of three key missile systems that were heavily used during the war against Iran.

The CSIS report, published on Wednesday, highlights a significant gap in American military readiness that the conflict has exposed. The three weapon systems in question were reportedly fired in large numbers during the campaign, drawing down reserves that had taken years to accumulate and that cannot be quickly replaced due to complex manufacturing constraints.

Production bottlenecks at the heart of the problem

The think tank's researchers point to long lead times for specialised components, limited production line capacity, and a workforce that cannot be scaled up overnight as the main reasons why restocking will take so long. Even with increased defence spending, the industrial base faces structural challenges that make a rapid rebuild essentially impossible.

The findings raise broader questions about Western military logistics and the sustainability of high-intensity warfare. If the United States — the world's largest defence spender — faces a multi-year replenishment timeline after a single conflict, the implications for NATO allies and partners that rely on American arms supplies are considerable.

NATO allies watching closely

For Estonia and other Baltic states, which depend heavily on the NATO security umbrella and US military commitment to the region, the analysis serves as a sobering reminder of the limits of conventional deterrence when stockpiles run low. Defence planners across Europe have increasingly warned in recent years that munitions reserves were dangerously thin even before the war with Iran further depleted them.

CSIS is one of the most influential foreign policy and defence research institutions in Washington, and its assessments frequently inform congressional and Pentagon decision-making. The three-year estimate is likely to feature prominently in upcoming debates over the US defence budget and industrial policy.