The Defense Department’s inspector general has provided a detailed account of the U.S. military’s challenges and losses during the first four months of the ongoing conflict with Iran. The report, released on Monday, covers the period from February 28 to June 30 and offers new insights into inventory shortages, damage from Iranian counterattacks, and the logistical strains facing U.S. forces in the region.

While government officials have publicly stated that the objective of military operations is to neutralize Iran’s nuclear program and missile capabilities, the report notes that the full mission statement remains classified, suggesting additional undisclosed goals.

Financially, the inspector general highlighted the difficulty in calculating the total cost of the war, pointing out that no separate congressional appropriation has been designated for these operations. Instead, initial funding was drawn from existing Pentagon budgets allocated for training and maintenance. On June 24, the White House submitted a $67 billion supplemental funding request related to the war, with $21 billion earmarked for munitions replacement. The State Department also estimates approximately $184 million in damage to U.S. diplomatic facilities across the Middle East due to Iranian strikes, including more than $157 million in damage to the U.S. diplomatic mission in Iraq, which endured over 600 attacks within the report’s timeframe.

The report draws attention to significant munitions shortfalls resulting from the high rate of expenditure during the conflict. These shortages have pressured military leaders to accelerate production; however, expanding manufacturing capacity faces notable delays, especially in solid rocket motors, explosives, and propellants. The Congressional Budget Office corroborated these findings, confirming substantial depletion of U.S. munitions stocks, though Pentagon spokesman Sean Parnell denied claims that the United States is facing shortages.

Approximately 50,000 U.S. military personnel have been deployed in the Middle East to support the conflict, with units rotating through the region. The report details the deployment of around a dozen fighter squadrons, destroyers, air defense batteries, mobile launchers for artillery rockets, and guided missile systems, alongside four aircraft carrier strike groups and a partial deployment of the 82nd Airborne Division. Iranian counterattacks caused extensive damage to U.S. military infrastructure across multiple countries, including Bahrain, Iraq, Jordan, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates. These attacks destroyed or damaged hundreds of buildings and several dozen military aircraft, including 30 Reaper drones, 12 KC-135 aerial refueling planes, four F-15 fighters, and one A-10 attack jet.

In terms of casualties, the Pentagon’s data shows 18 U.S. deaths and 824 wounded since the conflict began. Medical facilities have been established at all deployed locations, with more advanced surgical support available in select countries, supplemented by host nation hospitals when necessary. Notably, medical evacuation helicopters had to be relocated due to Iranian strikes, and most casualties have been transported via ground vehicles rather than air evacuation.

Logistical challenges have intensified following Iranian attacks that destroyed the Navy’s primary logistics hub in Bahrain. The Navy shifted its operations to Diego Garcia, a British-owned island more than 2,200 miles from the Arabian Sea. This relocation significantly increases the time supply vessels spend traveling, fueling, and returning to operational zones.

The report also underscores the strain placed on other U.S. combatant commands. U.S. European Command has provided substantial support by transferring munitions, equipment, personnel, and supplies to Central Command, which manages operations in the Middle East. The Pacific Command, based in Hawaii, has expanded its role to include boarding suspected Iranian merchant ships in the Indian Ocean and contributed six warships to the conflict, including the aircraft carrier strike group centered on the U.S.S. Abraham Lincoln. This carrier departed San Diego on November 21 and has spent roughly nine months at sea without a port call; it is currently en route back to its home base in Southern California.