WASHINGTON — The U.S. Air Force has finally flown its variant of the F-35 in combat, using two of the aircraft to take out an ISIS tunnel network and weapons cache in Iraq on April 30.

Tuesday’s airstrikes — the first U.S. use of the F-35A conventional takeoff and landing model at war — follow the combat employment Israel Defense Forces’ F-35As in May 2018 and U.S. Marine Corps’ F-35Bs in September 2018.

F-35A deploys to Middle East for first time The F-35′s arrival comes a little more than a month after B-1B Lancer bombers completed their deployment at Al Udeid Air Base in Qatar

According to U.S. Air Forces Central Command, the airstrike occurred at Wadi Ashai, in northeast Iraq. An April 24 news release from U.S. Central Command stated that ISIS fighters “have been attempting to move munitions, equipment and personnel” to Wadi Ashai in order to “set conditions for their resurgence,” prompting a counter-offensive by Iraqi Security Forces and supported by Combined Joint Task Force – Operation Inherent Resolve.

“The F-35As conducted the airstrike using a Joint Direct Attack Munition to strike an entrenched Daesh tunnel network and weapons cache deep in the Hamrin Mountains, a location able to threaten friendly forces,” stated the AFCENT release, which used an alternative name for ISIS.

Further information about the event, including whether the strikes were successful, was not made available in the release.

An Air Force airstrike using the F-35A has been widely anticipated for weeks, after the service deployed the fighter jet to Al Dhafra Air Base in the United Arab Emirates on April 15. The service has not specified how many F-35s are now operating in the Middle East, but all jets are from the 388th Fighter Wing and the 419th Fighter Wing at Hill Air Force Base in Utah.

The F-35, made by Lockheed Martin, is the U.S. military’s newest fighter jet. The program has been beset by cost and schedule overruns since its start about 20 years ago, and the Government Accountability Office estimates that the program will cost in excess of $1 trillion over its lifetime.

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F-35 operators deployed to Al Dhafra praised the utility of the aircraft’s high-end sensor suite and computers in a combat environment.

“We have the ability to gather, fuse and pass so much information, that we make every friendly aircraft more survivable and lethal,” said Lt. Col. Yosef Morris, 4th Fighter Squadron commander and F-35A pilot. “That, combined with low-observable technology, allows us to really complement any combined force package and be ready to support AOR [area of responsibility] contingencies.”