The May 13 report, “U.S. Aircraft Combat Losses in Operation Epic Fury: Considerations for Congress,” draws on news accounts and statements by the Defense Department and U.S. Central Command to compile the list.

The CRS, the nonpartisan research arm of the Library of Congress, works from open sources and has no access to classified damage assessments.

The CRS authors note their count “may remain subject to revision due to multiple factors, which may include classification, ongoing combat activity, and attribution.”

The first losses came March 1-2, when a Kuwaiti Air Force F/A-18 Hornet mistakenly shot down three F-15E Strike Eagles over Kuwait. All six aircrew ejected and were recovered. The shoot-down occurred during active combat that included attacks from Iranian aircraft, ballistic missiles and drones, CENTCOM said.

A fourth F-15E was shot down over Iran on April 3, with both crew members recovered in separate search-and-rescue operations.

A KC-135 Stratotanker went down over western Iraq on March 12 during a refueling sortie, killing all six aircrew. The crew members are the only fatalities on the CRS list. The loss was not the result of hostile or friendly fire, CENTCOM said. A second KC-135 involved in the same incident landed safely at Ben Gurion Airport in Israel.

The toll on the tanker fleet grew two days later, when Iranian missiles and drones struck Prince Sultan Air Base, Saudi Arabia, damaging five more KC-135s on the ground and bringing total tanker losses to seven.

An F-35A Lightning II took Iranian ground fire over Iran on March 19 and returned to base.

Iran hit Prince Sultan again on March 27, damaging an E-3 Sentry airborne warning and control aircraft. A May 7 Washington Post report cited by CRS said the E-3 had been parked on an unprotected taxiway.

An A-10 Thunderbolt II went down April 3 after taking enemy fire during a search-and-rescue mission. The pilot ejected and was recovered.

Two days later, U.S. forces blew up two MC-130J Commando II special operations aircraft on the ground in Iran during the broader rescue effort for the downed F-15E weapon systems officer, after the transports couldn’t fly out of a forward airstrip. All aircrew were evacuated. An HH-60W Jolly Green II combat search-and-rescue helicopter took small-arms fire during the same mission.

Drones, meanwhile, took the heaviest hit, accounting for 25 of the 42 losses. The list includes 24 MQ-9 Reapers and one MQ-4C Triton lost in a mishap reported April 14.

Air Force Chief of Staff Gen. Kenneth Wilsbach told the House Armed Services Committee on May 20 that the Reaper had been the campaign’s standout platform despite the losses.

“Perhaps maybe the most valuable player was unmanned,” Wilsbach said. “No other platform is even close to the MQ-9.”

Notable gaps and omissions

Multiple outlets reported the E-3 was not just damaged but destroyed. Photos of tail 81-0005 published days after the March 27 strike showed the rear fuselage burned through, with debris scattered around the airframe.

The Jerusalem Post and Air & Space Forces Magazine both called the airframe a write-off. The Air Force operated only 16 E-3s before the war began, six of them deployed to Prince Sultan.

The HH-60W count is also likely low. At his April 6 news conference, Joint Chiefs Chairman Air Force Gen. Dan Caine described two helicopters in the rescue flight taking fire, with a crew member on the trailing aircraft suffering a minor injury. The Aviationist noted the account suggests both airframes were hit, not one.

The report does not list any AH/MH-6 Little Birds. Between two and four Little Birds operated by the U.S. Army’s 160th Special Operations Aviation Regiment were intentionally destroyed at the same Iranian airstrip where the two MC-130Js were demolished in place, The War Zone reported in early April, and photos geolocated by open-source analysts showed the burned-out helicopters next to the C-130 wreckage.

The 160th SOAR operates under U.S. Special Operations Command, and the absence of a DoD or CENTCOM statement on the Little Birds may explain why none appear in the CRS list.

Cost of war continues to climb

Acting Pentagon Comptroller Jules Hurst told the House Appropriations defense subcommittee on May 12 that the cost of operations in Iran has risen to $29 billion, up from the $25 billion figure he provided April 29.

“So, at the time of testimony from the ask, it was $25 billion, but the joint staff team and the comptroller team are constantly looking at that estimate, and so now we think it’s closer to $29 [billion],” Hurst told Rep. Pete Aguilar, D-Calif.

Hurst blamed the increase on “updated repair and replacement of equipment costs and also just general operational costs keep people in theater.”

The figure does not include the cost of repairing damaged air bases and other U.S. installations in the region.

A United States F-15E Strike Eagle fighter jet has been shot down by enemy fire over Iran, U.S. officials confirmed.

One of the aircraft’s two crew members has been rescued, Israeli media first reported. U.S. officials confirmed the reports in statements to CBS News and Axios.

A search for the second crew member is ongoing.

White House Press Secretary Karoline Leavitt told Military Times “the president has been briefed” on the downed fighter jet.

The Pentagon and U.S. Central Command did not immediately respond to requests for comment.

Officials in Iran, meanwhile, called for the search and capture of any surviving crew members of the jet, according to reports by the semi-official ISNA news agency and the Young Journalists Club.

The governor of one of the Islamic Republic’s provinces stated that anyone who captures or kills the crew would receive a special commendation.

Video circulating on social media appeared to show a low-flying U.S. Air Force HC-130 refueling a pair of HH-60G Pave Hawks over Iran while conducting a search for the downed crew.

Iranian state media on Friday shared images of aircraft debris alongside claims that Iran had downed a U.S. F-35 fighter jet.

However, images of the aircraft’s tailfin, specifically the red stripe on its vertical stabilizer, are consistent with markings used by the 494th Fighter Squadron, 48th Fighter Wing, based at RAF Lakenheath.

Iran also shared an image of an Advanced Concept Ejection Seat allegedly from the shot down F-15E.

The search-and-rescue effort inside Iran during an ongoing conflict greatly raises the stakes for the United States.

U.S. Central Command on Tuesday issued a statement denying claims that “Iran’s Revolutionary Guard Corps downed an ‘enemy’ fighter jet over Qeshm Island in the Strait of Hormuz.”

“All U.S. fighter aircraft are accounted for,” the CENTCOM statement read. “Iran’s IRGC has made the same false claim at least half a dozen times.”

The location of the downed jet has not yet been confirmed.

The shoot-down marks the first time during Operation Epic Fury that a manned U.S. aircraft has been brought down by enemy fire.

A U.S. F-35 fighter jet was reportedly hit by enemy fire during a combat mission over Iran on March 19, but was able to make an emergency landing at a U.S. air base in the region.

Six U.S. airmen were killed on March 12 when their KC-135 refueling aircraft crashed in western Iraq during combat operations.

On March 1, three U.S. F-15E Strike Eagle fighter jets were shot down by a Kuwaiti F/A-18 in a friendly fire incident. All six F-15 crew members ejected and were safely recovered.

A total of 13 U.S. service members have been killed during combat actions against Iran.

As of March 31, 348 U.S. personnel have been wounded, Navy Capt. Tim Hawkins, U.S. Central Command spokesperson, told DefenseScoop. Of those injured, the majority have since returned to duty. Six remain seriously wounded.

Reuters contributed to this report.

Two weeks earlier, on March 13, five KC-135 Stratotanker refueling aircraft were damaged on the flight line, two U.S. officials told the Wall Street Journal, as reported by Military Times.

Since Feb. 28, Iran has struck radar systems, satellite communications and mission-critical aircraft at at least seven U.S. bases across Bahrain, Qatar, Kuwait, Saudi Arabia and the UAE. The attacks have focused on infrastructure that U.S. forces depend on to detect threats, refuel aircraft and direct air operations in the region.

By late March, Iranian missile and drone launches had dropped more than 90% since the conflict began, according to U.S. Central Command. Meanwhile, the attacks that persist have zeroed in on radar sites, SATCOM terminals, tankers and now an AWACS.

Kelly Grieco, a senior fellow at the Stimson Center, said the pattern points to deliberate targeting, rather than opportunism. The strikes are systematic and target three “distinct functional categories,” she said, including radar and communications infrastructure, aerial refueling tankers and now the AWACS.

“Each is a critical enabler of U.S. air operations,” Grieco told Defense News. “That’s not random. That’s a target set derived from an understanding of how U.S. airpower functions and where it is most exposed. The pattern suggests deliberate doctrine, or something close enough to it, not opportunism.”

Joe Costa, director of the Atlantic Council’s Forward Defense program and former deputy assistant secretary of defense for plans and posture, said Iran’s targeting approach makes tactical sense.

“It’s much easier to hit stationary infrastructure on the ground than planes flying in the air,” Costa said. “The U.S. has a dynamic process to quickly reallocate global resources to mitigate risks to troops and the mission, but the real cost is the cumulative impacts this operation will have on long-term readiness for other U.S. priorities.

“The more assets we use and lose now, the less will be available later until maintenance cycles, repairs and new purchases are complete.”

Strikes on communications, missile defense infrastructure

Iran’s retaliatory campaign targeted communications infrastructure from the opening hours of the conflict.

On Feb. 28, an Iranian drone struck Naval Support Activity Bahrain, home of the U.S. Navy’s 5th Fleet. Satellite imagery later obtained by The New York Times showed damage to large SATCOM terminals at the installation.

Satellite imagery also confirmed damage to the AN/FPS-132 phased array early warning radar in Qatar, with at least one of the system’s three arrays struck in the opening days of the conflict, according to Planet Labs imagery obtained by the Middlebury Institute of International Studies. Similar strikes hit radar facilities at Al Ruwais and Al Sader in the UAE, according to satellite imagery reported by The War Zone.

Qatar purchased the AN/FPS-132 radar system from the U.S. in 2013 for $1.1 billion. The Iranian drones used to strike it cost an estimated $20,000 to $60,000 per unit.

CENTCOM and Space Force Public Affairs directed Defense News to previously released operational updates and declined to comment further about the strikes.

The targeting also extended to missile defense infrastructure.

Satellite imagery confirmed the AN/TPY-2 radar for a U.S. THAAD battery at Muwaffaq Salti Air Base in Jordan was struck and apparently destroyed in the opening days of the conflict, later confirmed by a U.S. official. The AN/TPY-2 is the primary sensor for the THAAD system. Without it, a THAAD battery cannot independently search for or track targets.

An already waning E-3 fleet

The damage to the Prince Sultan E-3 on March 27 comes at a time when the fleet is already stretched thin. The Air Force’s E-3 inventory has dwindled to 16 aircraft, the last delivered by Boeing in 1992.

In fiscal 2024, the fleet posted a mission-capable rate of 55.68%, according to Air Force data reported by Air & Space Forces Magazine, meaning fewer than nine aircraft were operationally available on any given day.

As of March 26, the Atlantic Council’s Forward Defense program, which tracks U.S. military assets committed to Operation Epic Fury, estimated that between 66% and 75% of the available E-3 fleet was deployed to the theater.

Air & Space Forces Magazine, which reviewed imagery of the damaged aircraft, reported the extent of the damage likely renders the E-3 unrepairable.

Grieco said the near-term impact is real, but manageable. Prior to the damage, six aircraft were forward-deployed, and the theater was operating “at the margins of what continuous battle management coverage requires,” she told Defense News.

“Five aircraft means accepting either a single continuous orbit or periodic gaps when a second cannot be regularly sustained. In those gaps, the air picture degrades, air battle management is less effective and the theater’s ability to coordinate a complex, multi-aircraft operation becomes significantly more constrained,” she said.

“The United States could send another E-3 to the theater,” Grieco added, “but there are only 15 left in the entire fleet — and every one deployed to the Middle East is one less available everywhere else.”

Philip Sheers, an associate fellow in the Defense Program at the Center for a New American Security, said the loss emphasizes the burden on the airborne battle management fleet. About half of the 16-aircraft E-3 fleet is mission capable, he said, and with six in the Middle East, only two or three remain for other needs.

“There is very little slack remaining for flexibility and adjustment, and that places a huge burden on the remaining fleet as well as other systems to fill in the gaps, potentially at the expense of other priorities,” Sheers said.

A ‘massive alarm bell’ for air defense

A March 2026 report by the Center for a New American Security warned that proposed alternatives to dedicated airborne battle management aircraft, including space-based sensors and fighter-based networks, are either longer-term technological prospects, unproven at battle management or highly vulnerable, and should be treated as complements rather than substitutes.

Replacing the airborne capability will take time.

The Pentagon moved to cancel the E-7 Wedgetail program in its fiscal 2026 budget request, citing cost growth, from $588 million to $724 million per aircraft, as well as survivability concerns in contested airspace. Congress reversed the decision, preserving the program in the fiscal 2026 National Defense Authorization Act and blocking further E-3 retirements until enough Wedgetails are in service.

According to the Government Accountability Office, the E-7’s first flight has slipped to May 2027, with full operational capability now projected for the early 2030s. Space-based systems proposed by the Pentagon as a longer-term alternative face a similar timeline, according to Space Force officials.

Near-term, Sheers said the loss will increase operational strain on the remaining E-3s and could result in increased dependence on carrier-based E-2 Hawkeyes and the Australian E-7 Wedgetail.

“The demand for airborne sensing to manage cruise missile and drone threats is not going anywhere,” he told Defense News. “Medium and long-term, this all bodes very poorly for E-3 readiness and highlights the need for DoD and Congress to resource a real solution to the shrinking and aging E-3 fleet.”

The KC-135 tanker fleet faces parallel pressures. Already cannibalizing parts from the boneyard, the Cold War-era jets have absorbed repeated strikes.

In addition to the five KC-135s damaged at Prince Sultan on March 13, multiple refueling aircraft were also hit in the March 27 strike, according to Air & Space Forces Magazine.

Costa pointed to broader implications that outlast the current conflict.

“The continued use and possible reallocation of high-demand, low-density assets like air defense systems will impact readiness for other U.S. global priorities,” Costa said. “That’s the real strategic tradeoff.”

Sheers said the conflict should serve as a warning well beyond the Middle East.

“The entirety of this conflict should be a massive alarm bell on the need for passive defenses, not just for U.S. forces in the Middle East, but over the homeland where drone incursions are increasingly frequent, and especially in the Indo-Pacific, where the Chinese missile threat is orders of magnitude larger and more difficult to suppress,” he told Defense News.

“Airbase vulnerability has been an issue for decades, and the drumbeat of independent analysis on this issue could not be louder,” he added. “If DoD doesn’t take these events as a wake-up call, we are setting ourselves up for disaster in a future great power conflict.”

Grieco suggested the effects may already be rippling through the campaign in ways that don’t show up in publicly available strike counts.

Those “less visible metrics” include tanker availability, AWACS coverage gaps and stockpile constraints, she said.

“If Iran’s strikes on radar and communications infrastructure are compressing warning times and creating gaps in the missile defense network, that’s operationally significant even if no additional aircraft are destroyed,” she said.

“The threshold for material degradation isn’t a single dramatic loss. It’s the accumulation of constraints that make the campaign more expensive, less flexible and less effective over time. We may already be past it in ways that won’t be visible until the campaign’s operational history is written.”

The Partnership’s Public Service Viewpoint Survey — conducted after the Office of Personnel Management canceled the statutorily required Federal Employee Viewpoint Survey, or FEVS — recorded a government-wide Employee Engagement and Satisfaction Index Score of 32 out of 100. The survey was fielded from Nov. 10 to Dec. 19, 2025, and received 11,083 responses from employees at 17 large agencies and 13 midsize agencies.

Among major DOD components, the Army posted the highest score at 48.1, Air Force civilians scored 38.5, and Navy and Marine Corps civilians scored 36.4, according to the Partnership’s data dashboard. Those figures are down from 70.3, 67.0, and 68.1, respectively, in the Partnership’s 2024 Best Places to Work rankings.

The Partnership cautioned that “significant differences still exist between the PSVS and FEVS,” and that results “should not be directly compared with the results of previous federal employee surveys.”

More than 58% of respondents government-wide reported that their engagement had worsened compared with late 2024.

Only 9.1% of Army civilians agreed that Defense Secretary Pete Hegseth’s political leadership team generates high levels of motivation in the workforce. Just 22.5% of federal employees overall said they were confident they could report suspected wrongdoing without fear of retaliation. More than 95% of respondents said it remains important that their work contributes to the public good.

Max Stier, president and CEO of the Partnership for Public Service, told Military Times that while DOD components posted the highest scores among large agencies surveyed, the results remain alarming.

“The scores were still alarmingly low, and uncover a workforce that has drastically less confidence in their political leadership and workplace performance compared to a year ago,” Stier said.

Stier added that the timing of the survey, which followed major 2025 workforce reductions, makes the findings more significant.

“This survey was conducted after the bulk of the federal workforce cuts had taken place, which makes the results even more disturbing,” he told Military Times. “It is likely that those who left were even more demoralized than those who stayed.”

OPM canceled the 2025 FEVS, the first interruption since the survey began in 2002, citing plans to refresh the questions and avoid prohibitive costs. The agency has said the FEVS will resume later in 2026.

DOD’s civilian workforce stood at roughly 694,000 people in early 2026, down from about 795,000 at the start of 2025, according to OPM data cited by Defense One. That included nearly 50,000 departures through the Deferred Resignation Program, with thousands more taking early retirement. About 30,000 positions deemed essential to national security were later refilled.

A Defense Contract Management Agency employee told Federal News Network that budget cuts and staffing shortfalls are undermining the agency’s ability to ensure weapons delivered to warfighters meet all performance requirements.

“We are asked to do more, but cannot,” the employee said. “Something will eventually fail and fail badly.”

An informal Federal News Network pulse poll of 141 current DOD employees conducted this month found rising strain as operational tempo increases. “Leadership has not shown leadership,” one respondent said. “The lack of morale will bite them if/when we need to go to a wartime pace. The workforce will not elevate the level of effort.”

Pentagon spokesperson Kingsley Wilson accused Defense One of cherry-picking data and described the Partnership for Public Service as anti-Trump, without specifying which parts of the survey would provide a more complete picture.

In response to the Pentagon’s characterization of the organization as anti-Trump, Stier told Military Times that over the past 20 years, the Partnership has helped leaders across the political spectrum to identify problems and track progress. It conducted the Public Service Viewpoint Survey to fill a “critical data gap on the federal employee experience” that was created with the cancelation of FEVs, he said.

“Good management shouldn’t be partisan. Every leader needs to understand their workforce, and federal agencies are no different,” Stier said. “DOD leadership should pay attention and act on to this very important and troubling data.”

In the Partnership’s press release, Stier said the findings are particularly concerning amid ongoing military operations: “Especially now as the U.S. engages in a new war with Iran, no government can serve or protect the public effectively with such rampant dysfunction.”

In response to a request for comment, the Army referred Military Times to the Office of the Secretary of Defense. The Pentagon, Air Force and Navy did not respond to requests as of press time.

The U.K. Ministry of Defence confirmed Saturday that U.S. forces had begun using the British base for “specific defensive operations to prevent Iran firing missiles into the region.”

The BBC reported at least three B-1B Lancers at the base, with the first aircraft arriving the evening of March 6 and two more on March 7.

Aviation tracking outlet The Aviationist reported four arrivals in the initial deployment, followed by a second flight bringing the total to eight B-1Bs in Europe.

According to The Aviationist, three of those aircraft diverted to Ramstein Air Base in Germany after low visibility prevented landing at Fairford following a mission over Iran; five are currently at Fairford.

The B-1B, originally built by Rockwell and now supported by Boeing, is operated by Air Force Global Strike Command and is a supersonic conventional strike aircraft capable of carrying up to 24 AGM-158 Joint Air-to-Surface Standoff Missiles internally.

B-1Bs have already played a significant role in the war. According to reports from early briefings, CENTCOM Commander Adm. Brad Cooper said B-1 and B-2 bombers had carried out pinpoint strikes on missile sites deep inside Iran during the operation’s first 72 hours.

In a March 2 post on X, CENTCOM said the bombers struck deep inside the country “to degrade Iranian ballistic missile capabilities.” At a March 5 press briefing at CENTCOM headquarters, Cooper said that America’s bomber force had struck nearly 200 targets deep inside Iran, including around Tehran, in the preceding 72 hours.

The forward deployment comes as Defense Secretary Pete Hegseth warned that strikes on Iran are “about to surge dramatically.”

On March 4, Hegseth said that the U.S. had gained control of Iranian airspace and was shifting from advanced stand-off weapons to gravity bombs. Basing bombers at Fairford significantly shortens turnaround times compared to flying round-trip missions from the continental United States.

Prime Minister Keir Starmer authorized U.S. use of British bases on March 1 for what he described as a “specific and limited defensive purpose” of destroying Iran’s missiles “at source,” following initial resistance to a request from President Trump. RAF Fairford is the U.S. Air Force’s only dedicated forward operating location for heavy bombers in Europe.

Three B-52H Stratofortress bombers from Minot Air Force Base, North Dakota, arrived at Fairford on March 9, the BBC reported, joining the B-1Bs already at the base.

U.S. Air Force Europe declined to confirm or deny the deployments.