It is difficult to estimate the full cost of damage inflicted by Iran’s retaliatory strikes. A Pentagon assessment provided to Congress last week put the cost of the single strike on the U.S. Navy Fifth Fleet headquarters in Bahrain on Feb. 28 at about $200 million, according to a congressional official.

On March 1, an Iranian drone struck a structure housing military personnel at the Shuaiba port in Kuwait, killing six American service members.

Satellite imagery shows the roof of that building partially collapsed.

An additional U.S. service member was killed in a separate Iranian strike on March 1 at a U.S. base in Saudi Arabia, bringing the toll to seven, the Pentagon said on Sunday.

The pace of Iranian attacks has slowed since the war’s opening days, but the strikes have continued. Al Udeid Air Base, Ali Al Salem Air Base, Al Dhafra Air Base, Camp Buehring and the Navy’s Fifth Fleet headquarters have all been struck more than once.

Missiles launched from Iran have flown as far away as Turkey. On March 4, NATO intercepted an Iranian ballistic missile headed toward Incirlik Air Base in Turkey, according to a senior U.S. military official. The base hosts a large U.S. Air Force contingent. Iran’s military denied firing the missile.

A second Iranian missile entered Turkish airspace and was shot down by NATO, according to a Turkish defense ministry statement on Monday.

Air defense and communication infrastructure

Among the costliest American losses to infrastructure have been to the air defense systems that protect U.S. and allied interests across the Middle East.

Iran has systematically targeted radar and communications systems, including components of the Terminal High Altitude Area Defense system, known as THAAD, which uses a radar to track and intercept incoming aerial threats throughout the region.

At Muwaffaq Salti Air Base, an important hub for the U.S. Air Force in Jordan, satellite imagery from February shows radar equipment at the base’s southern edge. An image taken two days after the war began shows severe damage to what appears to be an air defense sensor.

Military budget and contract documents indicate a single radar unit of this type can cost up to half a billion dollars.

A video from Feb. 28 shows an Iranian drone striking the headquarters of the U.S. Navy’s Fifth Fleet in Manama, Bahrain, damaging what appears to be a communications radome, a weatherproof cover that protects radar and communication equipment.

Gulf nations have also bought air defense equipment from American companies and deployed them near critical infrastructure, including oil refineries. Those foreign radar systems share information with the U.S. military, forming what defense analysts describe as a de facto, expanded U.S. military sensor network.

Iran has targeted such sites where air defense equipment was recently observed, like the Al Ruwais facility in the United Arab Emirates. Satellite imagery of the site from last year shows a THAAD unit near storage structures.

A satellite image taken after Iranian attacks shows significant damage to the storage structures. The Times was unable to verify whether the mobile THAAD unit was inside the storage structures at the time of the strikes.

Near Umm Dahal in Qatar, a long range AN/FPS-132 radar — built at a cost of $1.1 billion to provide early warning coverage across a 3,000 mile radius — apparently sustained damage to its main radar structure, as seen in satellite imagery.

The full extent of damage to U.S. air defense and communication infrastructure remains unclear. Michael Eisenstadt, a director at The Washington Institute for Near East Policy, said that the affected radars would be difficult to repair or replace.

But Seth G. Jones, a president at the Center for Strategic and International Studies, said that the damage would most likely not significantly degrade U.S. military capabilities in this war. “The U.S. has such redundancy in collecting intelligence and other information from sensor networks, whether it’s land-based radars, aircrafts or space-based systems,” he said.

Diplomatic sites

Iran has also struck nonmilitary U.S. targets such as the consulate in Dubai, and embassies in Kuwait City, Kuwait, and Riyadh, Saudi Arabia, forcing temporary closures. There have been no reported injuries in any of these attacks.

On Saturday night, the U.S. Embassy in Baghdad was targeted in a rocket attack. No casualties were reported. It was not immediately clear who was behind it and how much damage was caused. It is not included in The Times’s tally of damaged sites.

Adm. Brad Cooper, the commander of the U.S. Central Command, said on March 7 that Iranian ballistic missile attacks had dropped 90 percent since the first day of the conflict and drone attacks by 83 percent. Despite the declining pace, Iran has continued to strike American targets across the region.