The US spent 47 billion dollars on the war with Iran. Reuters According to the agency, the US military spent more than 47 billion dollars on the war with Iran. This is a quarter more than the Pentagon's July estimate of $37.5 billion. Of this amount, more than 29 billion dollars will be required to replace wasted ammunition, and another 6 billion dollars will be required for lost and damaged military equipment, including aircraft and UAVs. The calculations apparently do not fully account for the costs of repairing American bases damaged by Iranian missile and drone attacks. Hakin.az Contact us.