As of mid-October, the war with Iran has cost the US military at least $47.1 billion, according to US Central Command estimates. Most of the costs were a complete replacement of ammunition - 29 billion dollars. Another 6.1 billion dollars were required to replace lost military equipment, and additional costs, including the supply of American military personnel, amounted to approximately 11.9 billion dollars. However, the estimate does not take into account the cost of damage caused to American military bases in the Middle East, CBS News explains. Three months ago US Secretary of War Pete Hegseth told lawmakers that the war cost about $37.5 billion, not including damage to US bases. Last month, the Congressional Budget Office said the war could cost between $2 billion and $3 billion a month for the duration of the conflict. Donald Trump in Russian.