U.S. Central Command estimated that the U.S. military’s Iran war cost $43.6 billion through Sept. 3, with roughly $28 billion spent on munitions and the total excluding damage to U.S. bases. Internal casualty data cited by six U.S. officials put the number of service members killed since the conflict began on Feb. 28 at at least 22, four above the Pentagon’s public tally of 18; more than 820 troops have been wounded and three U.S. contractors have died. The prolonged fighting has strained U.S. stocks of precision weapons and disrupted oil and fertilizer shipments through the Strait of Hormuz, adding pressure to global crude benchmarks. The financial and human costs have intensified political scrutiny of Defense Secretary Pete Hegseth, with Sen. Elizabeth Warren accusing the Trump administration of concealing troop deaths, Rep. Thomas Massie seeking an impeachment vote, and Senate Democrats pledging investigations if they win the Senate majority in November.