A US government oversight body has published the first detailed official assessment of the consequences of the Iran war, documenting significant damage to American military infrastructure, aircraft losses, military deaths and shortages of advanced weapons. The report, presented on Monday by the inspector general of the US Department of Defense, identifies eleven US soldiers as having been “killed in action” and details disruption to key weapons supplies.
The assessment says Iranian attacks damaged or destroyed hundreds of buildings and other facilities at US military bases across Kuwait, Bahrain, Qatar, the United Arab Emirates, Saudi Arabia, Iraq, Oman and Jordan. The US naval base in Bahrain was particularly badly affected. As a result, US forces were forced to shift operations to supply bases located farther away.
The damage extended beyond fixed military infrastructure. Several US aircraft and drones were damaged or destroyed during the conflict, including up to 30 MQ-9 Reaper drones, each valued at around $30 million. Seven KC-135 tanker aircraft were also damaged or destroyed, according to the report, adding to the strain on US military capabilities.
The report separately records deaths resulting from incidents classified as non-hostile. One KC-135 tanker crashed in Iraq after colliding with another KC-135, killing six soldiers. The death of a pilot whose helicopter crashed into the Arabian Sea was also recorded as resulting from a non-hostile event. In addition, eleven soldiers in Kuwait, Iraq, Jordan and Saudi Arabia were classified as having been “killed in action”.
The conflict also exposed vulnerabilities in US stocks of advanced weapons and their replenishment. According to the report, shortages emerged in modern weapons and interceptor systems, with experts estimating that it could take around three years to restore stocks to their pre-war levels. The US Department of Defense, however, has rejected reports of an ammunition shortage.
The scale of the military costs is reflected in the financial figures released by the US administration. Defence Secretary Pete Hegseth estimated the known cost of the war at $37.5 billion at the end of July. Damage to US diplomatic buildings across the region was separately estimated at $184 million. Around 9,000 US citizens were also evacuated from countries in the Middle East and Europe.
US President Donald Trump sought to emphasise continued American weapons production in a social media post on Monday, saying the United States was producing “more exquisite and first-class weapons than ever before in our history”. He added that the weapons were being delivered daily to US forces in the Middle East and beyond.
The inspector general’s assessment provides the first detailed official picture of the conflict’s material and human consequences for the United States. Its findings point not only to the immediate destruction caused by Iranian attacks, but also to longer-term challenges involving military infrastructure, aircraft availability, weapons stocks and the cost of sustaining US operations in the region.
