While we celebrate the US military's accomplishments over the first forty days of the Iran conflict, a less desirable outcome has been the significant expenditure of munitions and reallocation of critical resources to the region. In Last Rounds? Status of Key Munitions at the Iran War Ceasefire, Colonel (Ret.) Mark Cancian and associate Chris Park crunch the numbers on the seven most heavily used munitions. Rest assured, there's enough left to cover any scenario with Tehran, but a future conflict with China in the Western Pacific highlights inadequate Pentagon inventories. Much like Ukraine before it, this conflict exposes the fragility of America's defense industrial base, making urgent, creative solutions from what Cancian and Park call the "primordial soup of R&D" essential. So, is Washington finally ready to take that lesson seriously?

Mark Cancian (Colonel, USMCR, ret.) is a senior adviser with the CSIS Defense and Security Department. He joined CSIS in April 2015 from the Office of Management and Budget, where he spent more than seven years as chief of the Force Structure and Investment Division, working on issues such as Department of Defense budget strategy, war funding, and procurement programs, as well as nuclear weapons development and nonproliferation activities in the Department of Energy. Previously, he worked on force structure and acquisition issues in the Office of the Secretary of Defense and ran research and executive programs at Harvard University’s Kennedy School of Government.

Chris H. Park is a research associate for the Arleigh A. Burke Chair in Strategy at the Center for Strategic and International Studies (CSIS).

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